He doesn't believe me 😔

Me and my boyfriend recently got back together. I was talking to a boy before we got back together and we were on the verge of becoming my boyfriend. My boyfriend just popped up out of the blue saying that he was coming into town did I want to go to the mall with him , at first I was skeptical about going with him. I choose to get back with him. I didn't want to hurt the guy I was talking to, he was a really sweet guy 😔. Btw me and the guy I was talking to we never had sex, we just kissed. My boyfriend now was the last guy that I had sex with. Me and boyfriend had sex last week, he said my vagina whole was big meaning loose. He thinks I have been sleeping around but I haven't. That really hurt my feelings. But when we have sex he doesn't do foreplay he just sticks in in there. I know that you vagina whole size depends on how aroused you are. Should I tell him how I feel ?Â