Use any little nagging voices or fears that you have to your advantage. Fear can be a terrific motivator if you use it that way.
I used to feel the same way as you do right now. I wasn't afraid of being hit either. I was always worried that I would be in someone else's way. Someone in a vehicle. Someone who didn't have 2 seconds for me to get out of the way. Now I just look at it like "I am on a bike, getting healthier, and you are in a car". I have just as much right to be here as you do. Use positive mantras to keep you moving forward with your fitness goals.
I want to hear that you went for your ride! Please report back! LOL (seriously)!
I ended up going for about a 30 minute ride. Once I got over my initial anxiety and convinced myself if I just followed my husband's lead I would be okay it was really fun! And I even saw another biker on the same road. =)
The fresh air did wonders for me. I'm gonna go do a TurboFire video now!