I’m sorry to hear about your accident. I hope your future surgery and recovery go well. Sometimes we have to go through trials in our lives to find out who the people that sincerely love and care about you really are. This is also an opportunity for you to get to know you better. You should also consider your-self fortune that your injury wasn’t more severe.
I believe you are on the right path getting treatment for your depression. If you are still having repetitive, unpleasant thoughts notify your physician he/she may need to make adjustment to your medication. Talk therapy is good too to sort out your feelings.

In the meantime, do not date or get another FWB situation until your depression has lifted. You need to focus on you and your recovery.