AITAH for saying “You’re not my type”

AITAH: So basically, I met this guy a few months ago was not attracted to him at all if anything I was more attracted to his friend. I’m not one who is attracted to shorter men (I am 5’6 and like 140lbs) and usually they have to have either a little bit of a chub or muscle I don’t wanna feel like if I’m on top I’m gonna smoosh them and I’m not even a big woman but the psychological thought of it. And this guy is probably my height and probably weighs the same, possibly even less than me. I mean, my oldest son is taller than him and they wear the same clothing size however it didn’t change the way that my feelings grew for him because the looks didn’t matter to me and as the relationship grew, I got to know him and we had so much fun together, both in everyday life out and about and behind closed doors he had asked me to be his girlfriend which I thought was really sweet even though we are sort of older (me 39F him 32 M) it was still a very romantic thing something I’ve never really gotten in my lifetime and we became official! shortly after information surfaced from his past, from his ex fiancé which we all have a past, that was confusing and hurtful that sort of shifted our present relationship. We ended up going out for a drink to talk about whether or not we want to continue the relationship. One turned into two and I had told him he’s not normally my Type he quickly asked what is your type and I told him well tall and like more muscles or like bigger and he’s like so you’re not sexually attracted to me? and I said I am now I said just that initial.. you’re just not my type normally. From that point on we went from I’d say pretty frequent in the bedroom to almost nonexistent and now I can count on my hands on one hand, how often an uninterested he is or at least in my opinion granted I tend to overthink and I have a very untrusting history, but I see that he’s been looking at dirty sites, etc., and if he has me right there, why… why?! is there something that shifted the relationship? Was it the façade that he had created that he wanted to present or the new leaf that he turned (assuming he really did turn one haha see trouble trusting people in general) that he wanted to present I didn’t see anymore? is it that his ego is hurt? Is it something going on with me? AITA?