As someone who is 2 months out of a relationship where I had been cheated on on and off for 6 months, I have a lot to say on the subject lol
After a relationship ends where cheating was an issue, you'll learn that the relationship was not worth the worry. Cheating is normally accompanied by numerous other issues, many of which are probably underlying. I got cheated on by boyfriend. He told me he needed a few weeks to himself, where we wouldn't see other people, and that when he was fulfilled he would come back to me, but he cut me off completely and I found out he left me because he had been dating another guy for a few days/weeks. The relationship lasted from November-May, and my friends told me after it had already happened all the times they knew that he had cheated on me (some of which happened to be with my friends).
The feelings that come with cheating never really leave, I feel like. I am over him now and I am with a great guy who makes me very happy, but there are still nights that I lie awake and wonder why I was never good enough for him, and what I did to deserve that. But you realize that the relationship was most likely lacking in other aspects and was doomed to fail regardless.
My advice is to embrace your sadness for a while. Suppressing your feelings only intensifies them. Lie in your bed and cry, listen to sad music, watch sad movies, hang-out with your friends, etc - distract yourself. As time passes, you'll feel less of a need to feel sad. There'll be days when you miss the relationship and the memories, but you do not wish to be with that person again, and thats okay. Some days you will be dreadfully depressed and will feel like there's no way out, and, again let yourself feel sad. These days of sadness will grow farther and farther apart as time passes. Time heals all wounds.
Now there's more to it then letting yourself feel sad. Sometimes you do have to force yourself to keep going. DO NOT stalk your ex's social media, DO NOT look through old pictures, DO NOT look at old messages. Take this relationship as a lesson. Look at all the potential red flags you missed, all your partner's shortcoming, all your shortcomings, and apply them to future relationships. Now you have a better idea of what works and what doesn't. But do not allow this to create problems in future relationships. Not everyone is cheater, don't punish a current partner for the mistakes of a past one. I promise jealousy and trust issues are not worth spoiling something potentially great
Basically what I'm getting at is, let time run its course. I know its cliche, but its true. Everyone heals at their own pace. Do not get too down on yourself, because the cheating was not your fault. Being cheated on taught me more about myself than any other event in my life. Its taught me a lot about what I want, what I need, who my friends are, how to handle loss, SO MUCH. I know it sucks, but in eventually you will be good as new - maybe even better. And you will meet someone who makes you realize what it means to be in love. Because sometimes you get lucky twice. If you can love and be loved once, it can happen again no doubt.
I wish you the best of luck, and I hope this situation works out for the best!
I feel so bad tbh.