I feel like I'm blocked when it comes to dating (M19).

Let me give you some backstory:

A few years ago, I was really needy and wanted a relationship badly. I met a girl through mutual friends, and I liked her. There were some red flags, but I ignored them because I was needy and thought I could help her.

We got together, and she ended up trapping me emotionally. While we were in a relationship, she told me that if I left her, she would do something to herself. She had serious mental health issues. She barely allowed me to speak to my family more than I spoke to her, which sounds crazy considering I was only 17 at the time.

Eventually, I managed to break free from that mental prison and ended the relationship. Even though it happened a long time ago, I still feel like relationships aren't safe to be in. I feel a lot of resistance when it comes to getting into another relationship.

Can someone maybe give me some insight?