I 'm in love with my best friend , but she does n't feel the same . How do I live through this ? - Details in comment .
I 'm 17 and I have my first girlfriend ; she has had several boyfriends before me , and she 's not a virgin . That does n't bother me , but when I think about her having sex with the last guy , who she was really in love with , I feel really insecure . How can I overcome this feeling ?