I'm really stuck

Look My story is too long But i'll make as short as I can I have been with this girl for 8 months and I didn't love her and I did some very stupid mistakes but after we broke up I realized that I really can't live without her and I want her back in my life but now she said that she moved on because I hurt her and she's going out with this guy who she doesn't love :/

Write her a letter (the kind that gets posted) and tell her that you feel very sorry for any hurt you caused her, and that you now realise how much you care about her, and that you would love to be with her again. If she doesn't love this new guy (how do you know that?) then she might give you another chance. Although, you might have to wait until things are finished with this new man in her life before she's willing to think again.

First thanks for the reply and she told me herself that she doesn't love this new guy but she just find herself comfortable with him and she told that she will break up with him and come back to me but then she said that it's all wrong and she cares about his feelings too so she just asked me to let go and that she'll try to let go too and I tell her everyday that I still love her and waiting for her but n.thg has changed ..

How long since you broke up? It sounds as if her heart is saying one thing, and her head another. I definitely recommend writing a letter - buy some expensive note paper with matching envelope. Maybe sent with a single red rose. Be romantic, but not dramatic, which can sound insincere. Don't do anything that might seem like harassment, but remind her when you can that you still love her. Sounds as if this new guy might be a rebound, but as said, you might have to wait until the relationship is played out.