Theo, as you have found out, many of us have been in your situation before. Once you learn to be comfortable with yourself as a single person, you will enjoy life so much more. Women are a very different breed than us guys are. After my first marraige broke up, i felt like i was a failure when in reality she was the biggest part of the problem, with her issues. I said to myself, I'm done with relationships, don't need the problems and baggage.
Then i met my now wife and i did not want to like her, but i did.
We have been married 10 yrs and she is 100% behind me and my Mustang. Hang in there and your life will turn around too.