Please, I need and advice.

At the end of the year I broke up with my ten years boyfriend. We broke up because I made a mistake of infidelity my first mistake in 10 years. In all that time, he made many mistakes including infidelity, but I always forgave him because he is not a bad person, he is just someone who was wrong.

Always try to understand him and strengthen our communication. But finally I made that mistake and I regret it a lot. What hurts me a lot is that he didn't want to give me an opportunity I feel like I'm not enough for him and in all the times that I did believe in him even whit his mistakes.

It's been two months and I can't stop crying, I can't concentrate on my activities, I'm going to therapy but I can't get out of this sadness any advice is helpful.