Please help me am suffering and I don’t know what to do

I used to be in a relationship for one year and he was everything in my life and I used to share all details with him

Unfortunately slowly I started to cut people out of my Life because he didn’t like some of my friends I know wrong please don’t judge I’ve been through a lot with him

We used to fight a lot and I was always the wrong one

I don’t know how to move on and I can’t even focus on my work anymore

I don’t trust myself and I don’t have confidence

I am tired and I don’t have any friends to help me

What should I do please advice

I lost my trust in people

I trusted him with every little detail in my Life even the thoughts In my head