venting!!

I am beyond upset because I'm visiting my dad for summer and I recently asked him if I could go back home slightly sooner than normal so that I could fly back with my cousin... Well when I asked him he said sure, if that's what I wanted... Well he got drunk and told me that I'm not going back with my cousin... So I brought it up again while he was sober and he keeps saying that I can't go back early and that he could keep my here longer than usual if he wanted too bc my mom would let him 🙁 anyways I'm really mad and emotional about it because I'm bored here and I feel bad that I want to leave him sooner than Normal but I feel like he needs to realize that I'm 16 and I want to go home and hang out with friends..it just really frustrates me bc I know he feels like I don't want to spend time with him but we barely spend time while I'm here so what's the point 😓 I just wanna go home with my cousin , please help