I totally had to force myself to ride at first. I was not comfortable in traffic, and I was not a good bike rider for about the first year. I'd get really nervous before every ride. But, I kept doing it, and I got more confident, and got better at it pretty quickly.

So, get on the bike. Make yourself do it. If you're feeling guilty, you need to ride. It will make you feel better.

Ride really early in the morning, when traffic is slower, and before you have a chance to talk yourself out of it.