Yeah, I tend to either be completely unaffected by the emotional environment, say if other people are arguing around me. But I'm hyper aware of how I'll impact others, and its really annoying sometimes. I'm always floored by how effortlessly XXFX types do it. Haha, oh my goodness. I've never been to college party, but when one came to our flat this year (friend's 21st) I briefly ended up in deep discussion with a fellow introvert about introversion... and then got too overwhelmed, couldn't escape the noise in my room, so left and went to the art building for 30 min. Before returning recharged and ready to face the people madness.
I'd venture a guess that IXTX's have an advantage here over the introverts who are feeling types (specifically Fe), as we feel less guilty about leaving a party because we need down time.
Tumblr you say, you are in for a fun ride Some good MBTI blogs:
FUN WITH MBTI
Also just searching the MBTI tag or (INTJ) tag can be a lot of fun.
My guess for the emotionality of entertainment, I think there might even be some psych articles on the topic, would be that it helps in developing empathy, which is part of Fe. My guess would be reading fiction stories like Harry Potter, Gone Girl, ect... would be good ways, because you can read and understand emotions of others (even if the technically aren't real... I chose believe otherwise...lol ). And via TV you can see and understand reactions. I don't always cry in sad movies, well normally I'm trying to hide my tears, but I unashamedly cry every time i watch Lion King... "Dad, you gotta get up." *tears up while typing* Stabs me in the heart every time... but I do love Scar. Apparently his real name is Taka, he changed it Scar after a run in with a wildebeest. But apparently Taka means "trash" and Mufasa means "king" . . . real nice parents those two had... Oh the things you will learn on tumblr...
And yeah, sometimes thats all you can do, but its all about baby steps, and one day you'll look back and see just how far you've come. For me my turning point was calling my schools counseling center, and talking to my best friend. If you ever need to talk, don't hesitate to message me or talk to friends in real life (if you are able).