Dear Thelma, I am confused after break-up

I DO not know how to put my problem into words; let me just start with how I got together with this guy.

I was having trouble with my previous boyfriend, and this guy, A, was always there for me. He is two years my junior and we see each other every day at university. We also texted every day, secretly. We didn’t plan for it to be that way, but I just needed to talk to him every day. And I did not plan to fall in love with him, but eventually I did.