WTF does it makes me so pissed off - when I see my girlfriend's ex liking all her pics and even she liking all his pics?

She said he is just a friend and nothing more - but still it pisses me off I try to stay calm and never bring this topic up, but deep down it hurts me. Am I being too childish or insecure?

WTF does it makes me so pissed off - when I see my girlfriend's ex liking all her pics and even she liking all his pics?
Post Opinion