
Rage room, allow yourself to feel your feelings it’s a marathon not a race. You can miss them and hate them at the same time you are complex and multifaceted. Try some new hobbies or get back into some old ones especially stuff like drawing or painting it helps works through your emotions
Everything #2 said plus whatever you do, do NOT get back together with them. Even if they beg, cry, buy you stuff. I’ve seen way too many people get back with cheaters just for the trust to be destroyed and the relationship to be toxic. Spend time with yourself instead of getting into a new relationship. It’ll be worth it in the end