Feeling trapped.

My boyfriend freely goes out and parties and i’m left at home time and time again. Although I love that i am expecting and that I will be giving birth to my baby girl very soon it just irritates me that he leaves whenever and i’m stuck home. Ive talked to him about it and he knows how i feel but the problem can’t really be fixed. I don’t want to seem so demanding and controlling by trying to stop him from going out and enjoying himself just because i can’t. does anyone else have this issue? & if so how do you deal with your emotions?