I don't wanna lose her & I want to get her back.

The first thing here is that you should learn a lesson from this about being too nice to girls. Three elements of any relationship that cannot be overlooked are respect, friendship and passion, and if any one of them is missing, it wouldn’t take long for the relationship to crash. Being too nice causes her to disrespect you which in the end isn’t good for the relationship. I’d bet that you neva scolded her for anything or even expressed your anger to her.

    Anyways, I think that you should try to get back your life. Do something like pick a new hobby or somethin like that. Meet new girls and try to improve your social networks cus in the end thats what will keep you strong when any girl lets you down. Now to win her back, I suggest that you give her some space. DON'T call or keep any sort of contact with her( that is not to say that If you see her that you should at least say hi, but keep things short and to the point.). After you have gotten your confidence back: ie gotten a new hobby, changed your wardrobe, made new friends and are feeling good generally, then try to reinitiate contact with her. DON'T beg,  no matter how much you feel like it. I believe that If you have improved enough she would at least give you one date. Just prepare urself for the possibility that she doesn't come back. That's why you have to get over her. Wish you the best of luck. If you find this helpful, holla back at me on the funmail.