Confused keta: now u have two options. Either leave her, and find a new girl or try to get her back. Girls become very stubborn when they want something. In my example, a girl loved me but I didn't care much about her. She was frustrated and she found a guy. I knew that and only then I realized how much addicted I was with her. I pleaded with her and begged her not to be along with other guy but she never thought a single time about getting back to me and left. Once you lose a girl and she finds somebody else it's very hard to get her back. Anyway, u can try and convince with all your effort. If you fail to do so, just damn it man. There is someone good waiting for you.
Take care and god bless you. Don't think that you have lost everything. Don't loose your mind and drive aggressively or drink too much or get tensed. This will hurt you for nothing.