How did you finally get over the pain of being cheated on?

About 2 months ago a relationship ended between me and a guy who cheated on me multiple times with the same girls, and ever since I’ve had a huge problem comparing myself to them to the point I don’t find myself attractive enough to meet anybody’s standards, even if I know I am not a necessarily bad looking person. People always tell me that the cheating had nothing to do with my worth and even though that’s probably true, it’s hard to believe that somebody actively seeking out another girl while being with me is not personal. So from personal experience with being cheated on, how did you guys finally accept and get over it?