I think coming here is a great start -welcome
At some level you must want to quit to have come here at all.
I think you would benefit from reading about AVRT: Rational Recovery. If you google it you will find a link. It really helped me understand why I wanted to quit but I didn't want to quit. Like you,nothing really bad had happened to me that made me quit at the point I did. AVRT really just clicked with me and helped me realize that I wasn't crazy or going round and round in circles changingmy mind all the time.