jealousy

so i’ve been talking to this guy for a couple months and just recently we’ve started becoming more serious. we’ve delayed having the “what are we?” talk because we both kinda knew we weren’t ready to become a thing just yet. but recently it seems like we’re definitely leaning towards becoming an actual thing. but my thing is, he’s always on instagram liking and commenting on other girls pictures and being kind of flirty. don’t get me wrong, i’m not saying he shouldn’t do it because we’re not official so he doesnt have to be with just me. i’m just wondering if that’s something guys tend to do and i’m not just out here making myself look like a fool lol.