What do you think of this convo? Am I in the wrong?

So I saw a post on this girl having trouble with her bf and it reminded me of me. I (19NB) am having trouble with my girlfriend (18F). I dated her a while ago but had trouble with my ex who I still thought about I believe, so I stopped liking her. Now we are together but with problems because apparently I’m in the wrong for wanting to call my best friend and see what he’s up to