Despite his logical Vulcan nature, Spock has had quite a few love interests during his tenure as a character in the Star Trek franchise. First introduced in Star Trek: The Original Series, Spock became arguably the most popular and well-known character in the franchise, appearing in multiple series and movies and played by many different actors since his debut in 1966. Spock's struggle with his half-Vulcan, half-human nature is one that Star Trek audiences seem to find endlessly fascinating, and his complicated relationship with his more human emotions has been revisited repeatedly for almost every iteration of his character.
Although Spock almost always tried to stick to the Vulcan way of life and suppress his emotions, there were times when they got the better of him. When this happened, one of the ways it manifested was in a romantic encounter, something that was usually the antithesis of Spock's personality and storylines and thus very enjoyable for Star Trek audiences to watch. While Spock hasn't had a record-breaking amount of romances during his time in the Star Trek franchise, all of them have been memorable in some way or another, and perhaps more interesting when they do happen because of their infrequency.
1 T'Pring 
T'Pring is arguably Spock's greatest Star Trek love interest, considering that she was once his fiancé. In Star Trek: TOS season 2, episode 1, "Amok Time", Spock (Leonard Nimoy) was forced to return to T'Pring (Arlene Martel) on Vulcan when he began undergoing the symptoms of Pon Farr, the Vulcan drive to mate. While TOS made it seem like the couple wasn't particularly well-acquainted despite their marriage being arranged as children, Star Trek: Strange New Worlds season 1 revealed that Spock (Ethan Peck) and T'Pring (Gia Sandhu) maintained a surprisingly loving relationship, choosing to become engaged as adults and striving to make their relationship work despite Spock's commitment to Starfleet.
Unfortunately, by the time of Spock's Pon Farr in TOS, the two had grown apart, and their relationship ended after T'Pring chose the kal-if-fee ritual during their wedding, forcing Spock to fight Captain Kirk (William Shatner) to Kirk's supposed death. At the time, Spock seemed less disturbed by the dissolution of his marriage than by the fact that he had apparently killed his Captain, but Strange New Worlds introducing the idea that Spock and T'Pring were close cast the end of their relationship in a much sadder light. After the events of "Amok Time", T'Pring was never seen or mentioned in Spock's life again.
2 Christine Chapel 
Nurse Christine Chapel is Spock's second-biggest Star Trek love interest, and like T'Pring their relationship has been explored in both TOS and Strange New Worlds. Unfortunately for Nurse Chapel (Majel Barrett), the relationship in TOS was portrayed as largely one-sided, with Chapel harboring extremely strong feelings for Spock while Spock was unwilling to or uninterested in acknowledging them. Although "Amok Time" hinted that Spock might return Chapel's feelings under different circumstances, her love for him remained unrequited throughout TOS, although it was frequently acknowledged in episodes.
However, Strange New Worlds retconned Spock and Chapel's (Jess Bush) relationship into something much closer. While season 1 largely stuck with the unrequited love angle, the trailer for Strange New Worlds season 2 showed Spock and Chapel sharing quite a passionate kiss and Spock displaying an emotional celebration afterward. If Spock and Chapel were indeed closer during their early years of working on the USS Enterprise, then Strange New Worlds has once again put a much more tragic spin on one of Spock's biggest romantic subplots, given Chapel's pining after Spock during TOS.
3 Leila Kalomi 
Leila Kalomi (Jill Ireland) was one of Spock's one-off love interests during Star Trek: TOS. A botanist, Leila met and fell in love with Spock prior to their on-screen meeting. Spock refused to admit any feelings for Leila initially, but upon the Enterprise's arrival at Omicron Ceti III, Leila deliberately infected Spock with the spores of the pod plant, causing him to experience emotions and profess his love for her in return. Spock intended to stay with Leila, but Captain Kirk was able to help Spock regain control by provoking him into anger, and Spock's more logical side reasserting itself ended his and Leila's relationship for good.
