<human>: Can you condense the text into a few key points?

My boyfriend (19) and I (18) have been dating for two years almost three. For the most part it's been awesome, with the exception of arguments here and there. To keep long stories short.... Am I overreacting to him calling other girls beautiful on the Internet? And liking girls half naked pictures on social networks? I'm struggling with insecurity issues, and he knows this too. I know, he knows I can see his comments and likes. I just want to know if I should bother being upset, or it's not a threat to our relationship and I can just ignore it.
<bot>: I want to know if it's okay that my boyfriend calls other girls on the Internet beautiful, and that he also likes half naked girls pictures on social networks. Is it harmless? Or a small threat to our relationship?