Question about this girl and her Instgram.?

There is this one girl I know and we used to not get along well (Long story). Anyway when I first made an instgram abou a year ago I found her profile. It was public but I never followed her due to us not getting along. Recently I stumbled upon the profile again and it was private. I didn't follow her still. At school I do pretty stupud stuff and she is sorta tied in. I check her profile occasionaly and noticed usually when Iv done something it becomes private but only for a few days. One day while it was public I accidently liked one of the pictures. She never said anything but I unliked it because it didn't feel right. Today at school I did something stupid that sorta did with her and the profiles private again. It seems to be a pattern do you think its my fault or I'm over reacting? Don't call me weird or a stalker. I'm just trying to figure things out between us.