Getting Over A Breakup?

I broke up with my girlfriend of 2 years this past weekend and I am having trouble getting over her. In the beginning of our relationship, everything was perfect but a few months into it, I caught her flirting with a guy through facebook inbox. I was crushed because she lied to me about it initially but then she told me that she knew the guy liked her and was just messing with his head and leading him on for fun. I didnt really believe her but I gave her another chance. I continued to catch her in lies although they werent as big as the first one and we continued to fight. She told me that she was sick of me being protective of her which I was doing because she had lied to me so many times, and she was tired of me getting upset when she wanted to go to clubs, parties, or hangout with other guys. I had lost trust in her and she was getting frustrated because it was taking so long to earn it back. Anyways, I was willing to put all of this aside because she is the first girl I have ever loved and been in a relationship with, and I felt like she was the one I could spend the rest of my life with. We got into an argument this past weekend about how she thought that we were going nowhere, and shes tired of me not calling as much (because she rarely answers) and she told me that she cheated on me. I dont how to feel about it because she didnt have sex with the guy, or even make out with him, she just kissed him briefly and she told me that she likes him, and yet she told me afterwords that she still loves me. I broke up with her and I havent spoken to her since, I deleted my facebook so I wouldnt have to see her, deleted her number, threw everything away that reminded me of her and I felt like all of this was the right thing to do. Im still very upset about it though, I dont go out with my friends or leave the house very much anymore and I spend alot of time sleeping or just thinking about it. I feel bipolar about it because sometimes I feel like I did the right thing and that I shouldnt take her back because she would do it again, and then sometimes I get upset and miss her, and I want to give her another chance because we were together for 2 years and maybe she just made a mistake out of anger. I realize that she had her shortcomings, but she was the first girl I felt like I could open up to because ive never been a talkative person, and I feel like Im never going to find anyone like her, or find another girl period. I just need some advice on what to do and how to get over this breakup, can anyone help me?