for the second time...

I fall in love with the same person for two times and we broke up two times...
It just hurt to let him go.. How can this happen to me? and Why must me? I never tried to look for perfect guy.. I just accept any guy that love his god, love his family and respect me.. Thats all... I keep asking myself "Am I did something wrong" " Is this a punishment for me?".. It really hurt that looking at my friends wedding pictures and babies... I did not know why!! Don't ask me!