How do I let it go?

Recently separated from someone I've been involved with because they decided to be with someone else. I cant seem to shake all those hurtful words I told them and its been replaying in my head. Mind you, they did say some pretty hurtful stuff to me too but for some reason, I felt like I never should've said what I did.

Its been a very toxic situation with us and its like even though they wanted to be friends and stay in touch, I decided to go no contact to protect my peace and heal. All this happened last weekend.

Do you think I should reach out to apologize for those things I said?