This hasn't been my experience. There aren't many people I consider good friends who aren't somewhat nerdy (though some are non-STEM nerds - history, the arts, etc.), but their amount of nerdiness, intelligence and STEM interest don't seem to correlate much with how emotional they are. And I'm not sure how I'd deal with being around people much more emotional than my friends are, even though I don't think I'm someone who'se unusually bad at dealing with that, and I do usually enjoy when people share their feelings with me.

I wonder if going to a college where nerdiness is the norm is part of the reason for this? Maybe being cold has to do with being a minorty, rather than being nerds?

There could also be selection bias at work here - sharing feelings is one of the things that makes me think I'm friends with someone rather than acquaintances.