relationship after divorce

has anyone gotten a divorce (he slept with someone for a year starting when i was 6 months post partum) then fell hard fast for someone that actually made you their priority? i didn’t realize how much i tried to blow off my ex’s behavior until i was shown what it’s suppose to be like, and it scares the shit out of me to feel this only 3 months after my divorce. i wasn’t looking, he literally came out of no where.