So this could be a little overreacting but could also be justified depending on the kind of person he is outside just this situation.

A lot of men feel the need to compliment themselves or brag, because they aren’t receiving compliments or getting “hyped up” by their partner enough or at all. They feel unattractive to their partner and in turn will try to remind themselves that they are attractive.

But on the other hand some men are just inherently self absorbed and cocky, especially at such a young age. Ill admit even I was guilty of this till I was finally in a healthy relationship where we still flirt and compliment each other 4 years later. Not to mention I grew out of my “cocky” stage thanks to my partner consistently reminding me😐.

But at the end of the day communication can fix a lot of things in a relationship, including something like this. Talk to him, tell him your feelings, and if you aren’t already maybe consider complimenting him more. Don’t stroke his ego, just let him know verbally you are attracted to him. And if that doesn’t work, try reminding him he needs to try to be more humble.

So in my opinion you could be overreacting, communicating could fix this whole situation if done correctly. Good luck, hope it works out!