I went through the exact same thing after my accident... The first ten or fifteen times I got back on the bike I was terrified that cars were going to pull out in front of me, rear end me at lights, etc. It just takes time in the saddle with nothing bad happening to remind you that getting hit is an exception, not the rule. The more time you put between you and your accident the easier it will get.

Just like everyone else said, I also adjusted my riding habits to try to reduce the risk of getting hit as much as possible. Now I do things like always wear gear, flash my brake lights when I am the last person in line at a red light, watch behind me when I am stopped to make sure I am not going to get plowed, leave the bike in gear until there is someone stopped behind me so I can get out of the way if it looks like someone is going to not stop in time, make better lane choice decisions, actually think about the stuff they teach in the MSF class, etc. There are tons of things you can do to reduce the risk, then it just takes time to get over the feeling that everyone on the road is out there to kill you.