Except that, at least in my social circles, men are just as able/willing to talk about their feelings as the women. So your "fact" is anecdotal local observation only. It becomes a stereotype when you decide it must apply universally.
I actually said "men having shorter hair than women" was a "fact" and was using that as an allegory to other types of gender observations. So my "fact" is anecdotal observation based on hair lengths between genders (which is pretty obvious). My point is some anecdotal observations can be accurate.
I never said men not sharing & caring was a fact. I was just saying it does apply to many men (an observation), not to all.
Since the OP is writing an emotionally reserved male character, I feel it's important to address the psychology of that
type of man.
As for your social circle (which is also an anecdotal observation) I wonder if the men are more likely to open up to the women in the group rather than to the other men. Because I know personally that I'm more likely to open up to my female friends generally speaking.
Your guy friends might share alot with you, but do they share as much with each other? Just curious....
Anyways... this is getting a little off topic since the thread is not about men in general, just the character the OP wants to write about.