Not all women bleed when they first have sex. Some people don't even have hymens the first time they have sex (hymens can be broken through riding a bike, using a tampon, masturbation.) It's not good or bad that you didn't bleed and says nothing about your virginity.
It is a common perception of both males and females that bleeding always occurs on first intercourse. While that often happens, and very often in cultures where the hymen is protected, it is no always the case by a long way.
Bleeding often occurs when the hymen is ruptured for the first time. There could be a number of reasons why you didn't bleed.
- The hymen may have been already ruptured
- Have you had a cervical smear taken?The doctor's speculum might have ruptured or stretched your hymen
- Do you masturbate?You may have ruptured it when masturbating.
- What other sexual activity have you had with your boyfriend?He may have ruptured your hymen if he fingered you.
- Have you engaged in vigorous sporting activity?Sometimes the hymen is broken during cycling, sports, horse-riding &c
- The hymen may not have ruptured
- Have you checked your hymen?It may be very elastic or tough and has not ruptured at all
- What size is his erect penis?A small penis might not rupture the hymen
I hope this helps as a start. Are there any religious or cultural issues?