She cheated on me but do I take her back?

My girlfriend for 8 months cheated on me and now I see she is realizing she made a huge mistake cheating on me. The guy is turning out to be nothing she wanted I can see she is hurt and is missing me. I kind of feel sorry for her because the guy she is currently with doesn't treat her as good as I use to. One of her friends told me she cries sometimes when they talk about there boyfriend's because she knows I really loved her and she feels there is no chance of us ever getting back together. I still love her and have learned to forgive her because I knew she was making a mistake all along. I don't know whether I should take her back because I am afraid of getting hurt again and my family will probably think I am crazy. What should I do?