my (22f) bf (25m) feels like he absolutely hates me?

so back story - when we first met he was getting w an old best friend of mine and they had just stopped. she talked sh** about me to him so he already knew who i was and when i met him i didn’t know that. when we began our relationship he would frequently talk about her (some negative, or just stories) despite them only seeing eachother for about 2 weeks. 6 months into our relationship i found him stalking her instagram to which he said she was hot and he only did it to hurt me after a fight but he was looking at sexual photos of her and idk what he did w them. we broke up for a bit due to different reasons over the summer for a month then got back together in august. this stuff has really bothered me since we’ve been back so i tried to talk to him about it, he kept blaming me for doing the things he’s done and saying it’s “bc we fought about this thing” or bc this other thing was going on. he also said “she was hit get over it” and out of anger that he would “f*** her” he apologized and said he only said those things out of anger and to get me to leave. when we were cuddling after and he was trying to reassure me he comforted me by saying “she’s not even THAT hot” after all this i told him i needed space and im not really sure where to go from here. i know he just planted so much more doubt in my head but he hasn’t physically done anything. i just can’t stand the disrespect and idk what to do.