I don't know what happened, but somewhere between when my way ex girlfriend and I broke up and now, I lost my confidence. I'm not really sure what happened, but now all when I see a girl that I would want to approach, I overthink things, and everytime end up not saying anything. It leaves me extremely frustrated, and only makes the problem worse. What's really stupid, is that the girl and I broke up almost 2 years ago, I'm really sick of having no confidence.

What are some tips and tricks to get it back?