свою девушку

one's girlfriend

→ свой
phrase Rare #30,971
one's girlfriend The reflexive possessive свою refers back to the subject of the sentence, so it can mean “his,” “her,” or “their” girlfriend depending on context. This is the accusative form, used when the girlfriend is the object of an action.
RU: Он не любит свою девушку.
EN: He doesn't love his girlfriend.

Том часто видит свою девушку во сне.

Tom often sees his girlfriend in his dreams.

Он не любит свою девушку.

He doesn't love his girlfriend.

Я должен забрать свою девушку.

I have to pick up my girlfriend.

— Женщины на грани нервного срыва (1988)

Я не хочу терять свою девушку.

I don't want to lose my girlfriend.