Relationship advice please

Jess
I'm so confused. I'm 29 and this is my first relationship. I met him on tinder and after a month of chatting he came to my place. He was sweet. I told him no shenanigans and he respected that, even though he was clearly very keen. I was too, especially because it was all new to me, but I wanted to be sure he was a good guy. Anyway, whether or not it was a good decision, we had sex the next time we met up, and a few times after that. Now it's been 3 months, and for the last half of that time we have not had any form of sex. The last time we were together I told him I wanted it, and asked why he didn't. He didn't really know why, only that he didn't feel like it. Last night though, (and twice this morning) I lost it. Crying and generally being a sook. He was sweet and comforting, but the only explanation I could get was 'I dunno, you broke me! I used to want it all the time and now I just don't' so I apologised for "breaking him", and he then said 'nah I guess it's a combination of things'. That's it. He keeps apologising and asking if I'm ok. He's still really sweet and seems to want me around. So what the fuck is going on?!! I feel like he unleashed a monster in me, and now won't attempt to tame it! If anyone has any experience from either side of this kinda story, or suggestions on how I can get him to say what is really wrong. PLEASE let me know 😔