That's one of the biggest issues with an injury of this nature. It's the psychological effect it has on the brain. You have it in the back of your mind that you don't want to do the same.Currently 7 months post op myself and had a set back when returning to running. Obviously I've not got a full medical team monitoring me every day, but the thought of going back to full contact sport so soon scares the shit out of me.
I remember when i did my second acl that during the rehab they tried to get me hopping. It's hard to explain but my brain refused to let my feet leave the ground. I spent hours doing the motion until eventually i got a few centimetres off the ground. Mentally it can be quite tough.