Answer:
tu (accent on the u)
Explanation:
I would use tu (accent on the u) because tu is the informal way of saying "you" in Spanish, and I would assume that you would talk to your girlfriend / boyfriend informally.
yo in present would be "me divierto"
never fought with anyone
comprar
1. It's 6:00 a.m. 2. It's quarter past nine p.m. 3. It's midnight.