Context: this is a bygone relationship, just asking out of curiosity. My ex was not an especially sexual person but at the time i believed that she was okay with it now and again. We're about 17-18 here.

Also, mobile, so sorry for format

My ex and i started doin the deed about 4 months into our relationship. My ex had previously stated that she'd like to wait till we were both 18 for whatever legal/personal reasons and I respected that, but we carried on with lesser stuff (handsy thing, you get the drift). However, handsy things lead to greater things and we ended up doin it before either of us turned 18. It was a mutual thing after a nice long dinner.

This was fine and dandy and we continued having sex occasionally but never incredibly often. Over the year long relationship we probably did it 8-10 times. Often i'd begin to intiate but she'd decide not tonight and instead of telling me straight up, she'd just say "eh" and shrug, leaving me very confused about what she was feeling. Even if i prodded which made me feel like i was trying to pester her into sex, she'd just say "i'm not really sure." Usually this bummed me out but i'd never throw a fit or anything, just lay down and cuddle with her more. I suppose this sequence of events often left a sour taste in her mouth because usually on those nights she'd leave quiet or vaguely unhappy. (In my parents place so she'd never stay the night) I may have been a little too persistent as this was my first sexual relationship and it was hard for me to know when was okay and when wasnt so i'd generally try a shotgun approach and always throw a hint in that i'm down tonight. If she said no, i'd usually back off completely, and if not completely, just more throwing hints.

However, when the end of our relationship inevtiably came, she claimed that the only time she'd ever agree or initiate sex, she did so solely because she thought it would make me happy or make our relationship better, not because she actually wanted to. She added that when i'd get bummed out (slightly, mind you. It's not like i was upset that she isnt readily horny for me), she'd feel like she was letting me down or upsetting me. This left me a little hurt, because if she'd told me she just wanted to stop having sex i'd have agreed in a heartbeat until she felt ready. She later decided that she's asexual and I havent really heard from her since then.

So, reddit, AITA for not taking hints, or am i in the clear for trying to have sex with a girl who I was under the impression wanted it?
