Advice please

I’m in need of some advice with getting close to someone after you’ve been hurt.

Last November my boyfriend of two years cheated on me and we broke up. I had a hard time getting close to someone since then.

Then in February I started dating someone. I let my guard down and decided to be happy. Well he ended up breaking up with me because his friend wanted him to.

Now I have an even harder time allowing men to get close to me. Every time things get kinda serious I get anxiety and try to push them away.

I need help because I feel like I’m doing something wrong. Any advice for me?