How to get over heartbreak?

I’m really struggling my partner changed dramatically over night about a month ago, and I woke up this morning and he’s left home with his things late last night.

We were having a rocky patch like most people do but no explaining, he’s blocked me off everything. My feelings are instantly hate and anger, I deserve better than this and I need help to recover, heal and get over this.

Does anyone have any idea how I can self help myself ?