What do I have to do to get my girlfriend back to the way she was?

Me and my girlfriend have been dating for 8 months. I’m 18 she’s 16 and here’s the shocker: I’m a virgin and she isn’t. she told me it’s because she doesnt find sex to be something important and she has only had it with two guys one being her ex which she had sex with 3 months in andnthis guy she only saw once a week. so doing the math the 12th time she saw him she did him (also having sex with him nearly every time after). I’ve seen her 5-6 times a week for nearly 8 months. so that’s at least 160 times… and I stay with her for 6+ hours on each of those times. and its not that im less attractive than he was she’s said im much more attractive than him actually and I doubt shed lie about something like that because she’s normally brutally honest and doesn’t really seem to care whether she hurts my or anyone else’s feelings.

she’s expressed to me why she doesnt want to have sex wiith me and I agree with her in saying we should wait so thats not the problem, the problem is that we USED to make out a lot and do other stuff like fingering, oral, etc. now we don’t even kiss and honestly I feel like we’re stereotypical married couple. I mean we still do stuff… well I guess its more me doing stuff to her but its only twice a week, if that, when we used to 3 times a day and she’d do things to me too. im never able to initiate because one of us always ends up mad.

what I’m trying to say is I miss the girl I fell in love with the one who’d show me she was interested in me, when im with her now all we d is watch tv and I can’t f* stand it it drives me crazy because I feel like im not with her anymore im just there doing nothing and if I try to read a book of mine or draw she gets upset with me saying I dont want to spend time with her. I’ve tried taking her places but she never wants to go out. I love this girl and I can’t just let her go and I know that but its been weighing on my mind that I should ask for a break.

and yes I’ve tried talking to her about this.