Raj faced challenges throughout The Big Bang Theory's twelve seasons in finding and maintaining relationships. Particularly in the show's earlier seasons, his selective mutism around women made it even more difficult. Despite Raj having more relationships than his friends, they were short-lived and ended due to differences. Throughout it all, Raj's tight-knit group of friends were his steadfast support system, which he ultimately chose over pursuing a relationship in season 12 of The Big Bang Theory.
The early seasons of The Big Bang Theory showcased Raj's comedic struggle to communicate with women unless he was under the influence of alcohol. However, the show later introduced Emily, an acquaintance of Penny's who was deaf, making her an ideal partner for Raj as he did not need to speak to communicate. As Raj's dating experiences unfolded, they revealed his desperation and willingness to settle for anyone, despite lacking common interests. This ultimately led to the end of all Raj's relationships, leaving him single at the conclusion of The Big Bang Theory.
Emily
Penny initially introduced Emily (played by Katie Leclerc) to Raj in season 5, episode 4 of The Big Bang Theory, titled "The Wiggly Finger Catalyst." Penny believed Emily was a perfect match for Raj, who struggled with communicating with women without alcohol due to his social anxiety and being deaf. For their first date, Raj relied on Howard, who knew American Sign Language (ASL), as Raj did not. The date seemed to go well, leading to a continuing relationship between Raj and Emily. However, it soon became evident that Emily was primarily interested in Raj's family wealth, although Raj himself did not mind as long as he had a girlfriend. Raj's friends, on the other hand, had concerns about Emily's intentions.
The relationship between Raj and Emily eventually ended after Penny informed Raj's parents about Emily's true motivations. Raj's parents then gave him an ultimatum: either choose to stay with Emily and lose financial support, or break up with her and maintain access to their money. Raj chose love over money, but it became clear that Emily was only interested in him for his wealth. Eventually, Emily ended the relationship because Raj's lavish gifts and lifestyle were not sustainable without his parents' financial backing, proving Raj's friends correct concerning their suspicions about Emily's intentions.
Lucy
In The Big Bang Theory season 6, Lucy (Kate Micucci) is introduced as a potential love interest for Raj. They meet at Stuart's lonely hearts Valentine's Day party in episode 16, titled "The Tangible Affection Proof." From the beginning, Lucy is open about her severe social anxiety and her efforts to step out of her comfort zone. Despite a few setbacks where Lucy runs away from their dates, Raj manages to create a dating experience that suits them both. While Raj struggles to communicate with women when sober, Lucy prefers to meet fewer people at once.
However, Raj's determination to introduce Lucy to his friends becomes the downfall of their relationship in the finale of The Big Bang Theory season 6. Although they had their moments of compatibility, Raj fails to consider Lucy's boundaries and the impact of her social anxiety. While it's natural for Raj to want to spend time with both Lucy and his friends, he overlooks Lucy's needs, ultimately leading to a somewhat traumatic ending for both of them.
Emily Sweeney
Raj and Emily had the longest relationship on The Big Bang Theory, lasting for three seasons. However, it abruptly came to an end in season 9, episode 15, titled "The Valentino Submergence." Their rocky relationship began in season 7, episode 17, when Raj initially connected with Emily on a dating site but asked Amy to meet her instead, backing out at the last moment. Eventually, they reconnected, but their differing interests and Raj's discomfort with Emily's macabre hobbies caused tension.
Although Emily became a part of Raj's friend group and bonded with them easily, it wasn't enough to sustain their relationship. Doubts about their compatibility started to arise by the end of season 8. The arrival of Claire and Raj's evident romantic interest in her ultimately led to the end of Raj and Emily's relationship. Raj struggled to commit due to their differences and his reluctance to acknowledge his discomfort with Emily's interests. While they briefly got back together in season 9, episode 18, it was confirmed that their relationship was officially over in season 10, episode 5.
Claire
Raj initially developed an interest in Claire (Alessandra Torresani) in The Big Bang Theory season 9, episode 14, "The Meemaw Materialization." Their first interaction occurred at Stuart's comic book store, where Raj left Claire his contact information to discuss her screenwriting project related to astrophysics. Unfortunately, Raj's involvement with Claire was complicated as he was simultaneously dating Emily. While Raj eventually stated that he was no longer dating either Emily or Claire in TBBT season 10, the issues began in The Big Bang Theory season 9, episode 22, when Raj openly admitted to seeing both Emily and Claire in front of Claire herself.
Ruchi
In The Big Bang Theory season 11, episode 3, Bernadette's coworker Ruchi (played by Swati Kapila) had a short-lived relationship with Raj, lasting only three episodes. It was clear from the start that Ruchi wasn't interested in a serious romance and simply wanted a fling with Raj. However, Raj's inability to keep things casual eventually caused their relationship to come to an end. The situation was further complicated by Ruchi's ulterior motive of stealing Bernadette's projects while she was on bed rest during her second pregnancy. Eventually, Raj's loyalty to Bernadette, his inability to engage in casual relationships, and his unwavering belief in true love contributed to the demise of his connection with Ruchi in The Big Bang Theory.
Anu
Raj's main relationship in Season 12 of The Big Bang Theory was with Anu, an ambitious concierge whom his parents had set him up with. Despite growing fond of Anu, their shared decision to pursue an arranged marriage out of fear of being alone ultimately led to their downfall. Raj struggled to trust Anu because he felt they didn't truly know each other. Additionally, Anu's practical nature clashed with Raj's idealistic romantic beliefs.
In Episode 22, "The Maternal Conclusion," Raj contemplated leaving Pasadena to proclaim his love for Anu. However, Howard helped him realize that their relationship was destined to fail. Raj and Anu had entered into the arranged marriage without genuine faith in the system, rushing to settle down without fully knowing each other. Ultimately, Anu's career opportunity in London became the best choice for both of them. Through this experience, Raj discovered that he could be content staying single as long as he had his friends by his side.