At wits end

I'm a 28 yo male and I've been engaged to my fiancé for almost 5 months now. We have been living together since the start of the year. My problem is that it's starting to feel like all we do is fight because pretty much when she gets a day off work she is straight to her gay friends place and gets drunk. It's been ok the last few days because she has been working night shift and I've been looking after her 2 girls. And she has been to tired to do anything, even sex. Now I know everybody need there own space an I'm cool with that but lately it seems like its alright for her to miss me but when I miss her and get home from a 10hr day and want to spend time with her I get my head bitten off and told that we spend everyday together. That was the whole point of living together so we could be around each other more often. She says she wants more affection so I do that then I feel like shit because the next day she says i smother her to much. I'm struggling to get my head around anything. And I'm starting to feel like we are drifting apart. We have only been together for 2 years and she seems to always miss her gay friend more then me. And they have been friends for over 9 years. I feel like a 3rd wheel when we hang around him. I want to have a life with her but it seems like all she wants to do is party and I'm just there for convenience when she is hungover. I have confronted her but it always turns into a big fight. I DONT KNOW WHAT DO I DO???????

id say she feels no pressure from her gay friend, no expectations.. is there any chance that she feels that you are making too many demands in any area?? maybe you should back off, and get a social life too.. we all need our mates, even you.