Do you feel anything?

Okay so me and my boyfriend have been together eight months now and have been having sex for four months. The last time we had sex we used protection of course and he asked me did I feel anything, indeed I did and I told him that. I am just nervous that he might leave me for another person because I don't please him anymore when it comes to sex because I'm not as tight as I was. I wanted to wait a little longer to have sex because I know if you wait three months your vagina shrinks or something like that. Should I feel embarrassed or ashamed, what should I do? I don't want to ask him.