she has sex and if the hymen is still intact it is broken out of the way.
There are none. All women are different. If you really want to know if she is a virgin or not ask her. After all - she has to take your word for it.
When a man has done "it" with her. The penis needs to be inside the vagina for a woman to lose her virginity. For further information, message me and I can add on further to this
A Boy and a girl have sex
It just happens, there's no right or wrong way to fall for a girl. When it happens, you'll know. :)
Then they will date and that's all.
nohing happens
try talking with this girl, and see what happens
a girl that happens to be me
Nothing
A girl should be attracted to her boyfriend. Nothing 'happens' except that they love each other.
Nothing happens.
Nothing happens seven years after a girl has her period. There's nothing specific about this length of time.