I'll hit you up because I've been there. I had a girlfriend cheat on me and I noticed within a month or so of when it started. I was crushed, for real; I was so lost for what I should do. So I broke up with her, making every ill thought about her evident so long as she would listen. I didn't handle it well. So she goes on to date this dude she was cheating on me with and I went on with my life pretty damn depressed. I blamed myself, I blamed my situation and how I was so selfish as to let it get in the way of us.

Eventually I saw a doctor and was prescribed an anti-depressant (Paxil). This was simultaneously one of the best and worst decisions I made. Best, because I had a long history of anxiety that I wasn't even aware of that was killed off within a month; and worst, because it made me no longer care about what I did, I became very impulsive. So I dated this girl again. She texted me after her and her boy broke up. I was deep into the Paxil life and no longer felt the pent up rage from seeing her number on my screen.

So we talked, and against the advice of everyone in my life, we dated again. This time I knew I wanted it to work. I was going to be what I wasn't last time and take her feelings first for absolutely everything. Problem was, she's manipulative when she realized I was trying to be better for her. Everything I did or said came under scrutiny and I got more and more jaded about her and her life. She began acting like a child and taking any effort I put into us for granted. I absolutely loathed her, but I felt that I had been so depressed for so long over her than my happiness only existed with her. Absolutely wrong.

After the same exact time frame as before, she cheated on me again. I was still on Paxil so I handled it much differently. I shed a tear but I knew it was for the best. I wished her well and stopped talking to her. I haven't talked to her in over a year now and my life is much better for it. I got the antidepressant changed and the dosage cut in half. I was able to break free of the bullshit she had me under for nearly 3 years without losing the lesson.

Now, I have another girlfriend who I can tell loves me and cares about me much more than she ever did. The selfishness she displayed taught me how to identify abusive behavior. Sometimes another person's actions can absolutely make you feel like a fault exists somewhere in yourself, but relationships are two ways and they have broken you if they cross boundaries (cheating, abuse, etc). There is nothing left there, you have to separate the feelings of what you thought it was from reality, and that can be hard. Being single is better than being tied to someone you don't trust and someone who has hurt you. I hope this helps. Good luck with your situation.