:/ am I over reacting?

So, if you've read my previous post you'd know that I go to school overseas and am gone for 3-4 months  every semester. When I left the first time my bf had tested his ex, this time I noticed that he deleted his social apps like wechat and Viber right before I came back, and last night I saw that he liked some girl's pic.. I asked about it and he brushed it off like it's some model he knows and how his friend is dating her.. He barely post on my wall but goes through another girl's wall to like her pic? Rly?  Am I really over reacting here?