Reference and history: We're both 18. M and F. She has had a past relationship that lasted about 8 months with a guy who forced her to do sexual things she didn't want to do, like showing her breasts, etc. 

So me and my GF have had a serious relationship now for about a year and a half. We haven't had sex yet, we're both virgins. I really want to but she says she's not ready yet and I tell her that's ok and we will of course wait for both to get ready, it's our first time after all. She generally isn't interested in all things sex at all. She very rarely gets horny, but it happens, it used to happen a lot more at the start of the relationahip though. But she does really enjoy our moments when they are happening, but tells me she feels kind lf bad oe ashamed afterwards and she doesn't know why. The farthest we have gone sexually is dry grinding on each other while making out. We have never seen each other completely naked or touched each others private parts.

I've begun feeling a little frustrated sometimes when we go weeks without doing anything, meanwhile I see everyone else our age having sex daily and doing all kinds of things. I have asked her if she has thought about trying to masturbate, maybe the feeling will awake her sexual desires. But she said she just isn't interested in it. I've said to her that a good relationship needs a good sexual relationship aswell, but I don't think shes taking me seriously.

I'm thinking of asking her again to please try it sometime, that it might work and make our relationship get a healthy sexual side to it for once. AITA for wanting this?

I'm thinking some of this has to do with her terrible experiences with her past boyfriend, and her parents telling her she can't have sex until she's "grown up". But she's 18, she has grown up all right.