I talked myself out of it.
That's why I started reading my university books again. I had read something that made me realise this.
"Have you wondered why some people are successful, while others are not?"
That question pointed the accountability mirror right at myself. It made me realise that it is possible to accomplish what I left mid-way.
"Stop quitting. Successful people are those who didn't quit."
Simplest answer to my problem.