<human>: We've been together for a year and a few months and we've currently in a long distance relationship. I've caught him flirting with other girls on instagram before, but I decided to forgive him. We broke up recently and so he added a ton of girls to his instagram. BUT we quickly got back together. Now girls been commenting back and forth on his photos. That kind of bothers me because it is one girl that is doing it. 

Another girl left a heart face, but that didn't bother me too much. He refuses to add me to instagram now, but has me on facebook. I'll admit, I know what he's doing on there only because I made a fake account and he added me on there. It really bothers me with all the commenting by girls on his instagram, I just imagine that maybe he is interacting with them through more than just instagram. Am I freaking out over nothing? I just have a problem with detecting if girls are flirting or not though messages...

Can you succinctly summarize the text in 1-3 sentences?
<bot>: Girls comment on my boyfriends pictures on instagram, and he refuses to add me on it. Am I freaking out over nothing, or should I be worried?