<human>: Summarize the given text in a few sentences.

Two years ago my High school sweetheart broke up with me. We had started dating when we were both 16-17. We were extremely compatible and had a great relationship up until the last few years where things became extremely routine. She couldn't see a future with me and I was just kind of going through the motions in the relationship, neither entirely satisfied nor overly displeased to move on. She eventually cheated and we tried to work it out for a while, but it was not salvageable.

Nonetheless, I took the breakup very hard and I've just been trying to feel like a normal person since then. I've been working through depressive thoughts by exercising a lot. The ex has ignored me for the past 2 years, which has hurt a lot, since she became very much a part of my family.

I haven't dated much since then- only once, but it was a small fling. I can't seem to get myself to go out and start dating because I feel like it's such an overwhelming process of getting to know someone all over again. That, and I just have a problem trusting women and I don't want to get too involved. I'm a good looking guy and I'm in shape, so there's no reason why I should feel like I can't go out and meet new people. Yet, it's as though I'm trying to protect myself from future heartbreak, since I seem to consider that one relationship to be my greatest failure.

Is there any advice that anyone can give me? Has anybody been in a similar situation? If so, how did you get through it?
<bot>: Dated girl for almost 8 years, she cheated, I can't bring myself to date and I have trust issues.