I had my fist sex but didn't bleed now i hav serious problems wth him he thinks i wasn't a virgin. how can i prove it was my 1st time?

Broken hymen before: Many girls have had their hymens broken spontaneously before they ever got involved sexually with anyone. If he is evidencing such a lack of trust in what you tell him at the beginning of the relationship this doesn't bode well for your future together which is ultimately based on trust in each other. If he doesn't immediately apologize after you educate him "let's call the whole thing off".

It happends: Bleeding with the first penetrating intercourse is commonplace.The most common situation involves a girl whose hymen (the tissue ring inside her vaginal opening) is torn during sex. However, some are born with little if any hymenal tissue or it can be torn before any sexual activity ever takes place. If so, no tearing will occur and no bleeding would occur.