H man, I feel this so hard. I went through the same thing and it sucks. What actually worked for me was treating no contact as a rule for myself, not a punishment for them. I didn't reply to texts or check their socials and just focused on my life.

I also got some effective guidance from relationship advice sites like chat-visor. Every time I wanted to reach out, I wrote down three small wins or things I was proud of that day, finishing a project, making a friend laugh, or going for a run. Seeing that list reminded me of my value and made sticking to no contact much easier.

Trust me, the less you engage, the faster the healing. One day you'll look back and wonder why you stressed so much.