Is virginity is still important?

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there is a girl i know,she is pretty and sexy,and every time i see her,i always think that,what if we will have a bedroom affair,and some say that she has a crush on me,but i have a girlfriend already. i just want to ask you people is virginity is still important now a days? coz' i don't know if she conserving it until marriage. but i want to try her. what do you think?