Need some advice. Been with my girlfriend for 4 years now, I've moved in with her and given everything of myself to her

This is long guys, sorry but I really need the advice.

Ok so, basically I've committed everything to her after 4 years. Moved into a granny flat in her parents back yard (which I wasn't too keen on, would you?) stopped doing everything I love like playing computer games, commit most my time to her now. But it's still not enough? Btw I'm a lesbian and she obviously is the girl in this relationship. I feel like I'm giving her so much but he constantly goes on that I don't put in enough to the relationship, love wise and money wise which is total bullshit because as soon as I get paid I but her something then all my money goes on bills and food. Really confused there. Another thing, she has made this new friend at work who is also a lesbian and apparently so amazing and the best friend ever (they only known each other for like a week.) this chick already has a gf but is always going on about their fights to my gf and my gf tells her everything about our fights. I'm not saying she can't have a close friend but they are very, very close. It's kinda weird. She works with her all day, comes home texts her allll day. I get nothing btw. Then if I say something she gets all defensive. I'm thinking that she has feelings for her but wouldn't ever tell me..what should I do?