asuming u felt u re a virgin, u av never had sex knowinly nd u av already told ure guy dat u were, u had sex nd there was no blood, how do u convince him dat u av never slept with another man?

He has to take your word. If he doesn't believe you, then the relationship itself is shaky.
If a lady has been involved in lots of physical activities like running, there is a probability that she might not bleed as the hymen might have been broken.

U shuld neva ave lied 2 him in d first place d truth is nowadays most guys r not concerned if a girl is a virgin or not as long as she isn't wayward

it will be very difficult, especially if the person in question has been raped before, how would u explain that?

Is he dating you based on the fact that u told him u are a virgin? if not why is he so concern about the virginity stuff, "and u av never had sex knowingly" I dont get that part? can u have sex without you knowing? girl u need to be straight here, have u had sex and u told the guy u were still a virgin or u were in that situation where a guy will tell you he just wanted to feel you and he wont penetrate? if that is the case, the hymen is just a thin covering that get easily broken. Anyway that aside if he cant accept ur word, there are alot of good men out there that will accept u virgin or not.