I’ve been single for almost 3 years after a hard breakup and I’ve finally found peace in my life and I’m happy. But now I have no desire to settle down with anyone anymore ..help?

I had problems attracting women for a LONG time because I wasn’t very confident in myself. I’m 30 next year, I’m doing well for myself now, and I’m finally at a place where I’m happy. I had a really hard time getting over a breakup from the woman I thought I’d marry. It’s been almost 3 years since and now women are flooding in. But I can’t commit and I’d like to…I think? But I can’t get close to anyone. Why is that?