Romance

Romance was the feeling of excitement and mystery associated with love.

Unusually for a Sontaran, Stonn was involved in a physical and romantic relationship with the human Tom Foster. Stonn referred to him affectionately as "my man". Tom wished to marry him. (AUDIO: A Photograph to Remember)

The Doctor
River Song once declared her belief that the Doctor was above the capacity for romance, although the Twelfth Doctor disputed it. (TV: The Husbands of River Song) The Thirteenth Doctor was unsure if she was in a relationship with Yasmin Khan, when questioned. (TV: Arachnids in the UK) The Tenth Doctor fell in love with Rose Tyler during their travels, but was never able to tell her. (TV: Doomsday) He later gave her the Meta-Crisis Tenth Doctor, who was essentially a clone of him with a human lifespan, so that in some way they could be together. (TV: Journey's End)

The Twelfth Doctor gave his opinion on romance once to Rani Jhulka, who was shocked he was so indifferent that she was a lesbian. He stated "Man loves woman. Man loves man. Woman loves woman. It's people hating that upsets me." (COMIC: The Swords of Kali)

Bill Potts told the Twelfth Doctor about Heather, the sentient oil girl, coming back for her, to which the Doctor noted: "how romantic". (TV: Twice Upon a Time)

The Thirteenth Doctor stated that she was "a romantic", (TV: Praxeus) but noted that she hadn't been on a date in a long time. (TV: Legend of the Sea Devils) Yasmin Khan had romantic feelings for the Doctor, but was unable to express them. Dan Lewis deduced this fact, and informed the Doctor, who lied that she hadn't noticed. (TV: Eve of the Daleks) The Doctor later told Yaz that if she were to go on a date with anyone, it would be her. She thought Yaz was "one of the greatest people [she'd] ever known", (TV: Legend of the Sea Devils) echoing Yaz's own feelings for her. (TV: Arachnids in the UK, The Timeless Children)

However, the Thirteenth Doctor wasn't prepared for romance, since "time always runs out". (TV: Legend of the Sea Devils) As the Twelfth Doctor previously noted, she was "tired of losing people". (TV: Twice Upon a Time) She didn't want to fix herself to anything, or to anyone, since she knew from experience, she'd never been able to make it work. The Doctor and Yaz discussed this together. (TV: Legend of the Sea Devils)