Not sexy?

Basically, I was having sex with my SO and he pushes me off of him and said he doesn’t find it sexy and to ‘get sexy’? I’m not that confident anyway which he knows and it’s just lowered my self esteem even more - obviously because I didn’t feel sexy anymore I no longer wanted to carry on. Could he have gone about it better or am I just being petty? He also posts in his group chat about us having sex including when he took my virginity idk I feel like he just has a lack of respect for me? Honest advice please🙁x