Truth be told, I've always preferred doing things alone, like going to the movies, shopping, sitting at a coffee shop and doing work (well, people watching and doing some work). Here's why.
I believe that movie-watching is inherently not supposed to be a social act. As much as I love you, chances are, I don't want to hear your commentaries. (Unless it happens to be: "Matt's hot." In which case, I agree, so we need to stop talking about how hot he is and watch him in action.) I don't like it when people cry during sad movies or scream during scary ones. I don't like it either when people laugh at inappropriate moments, and there are some people who just HAVE to laugh all the time. Not charming, no. When I'm watching a good movie, I'd like to be alone with my thoughts and emotions. I don't like to break down in public, so crying on an airplane during "Everybody's Fine" was not my most favorite moment. I do, however, like talking to friends before and after the movie, so the best arrangement would be to split, then regroup. You go watch your action flick or chick flick or whatever, I'll watch whichever movie I feel like watching at the time.
Shopping is just easier and faster when done alone. I don't like waiting in line for 45 minutes to change and then another 30 minutes to pay at Forever 21. I like it even less to have to wait for you, too. Sometimes I spend $200 on a pair of shoes. (I'm stressed. I've had a rough week. I feel lonely. One of those reasons.) Your judging eyes (I know you don't mean to) make me uncomfortable. You want to check out Wetseal. I really don't. I love Zara. You think it's pretentiously European. So there, I'm mildly annoyed. You're mildly annoyed. We should just set a time and do our own shopping and meet for dinner.
I like studying alone because it's just more comfortable that way. I only like the sound of my fingers jabbing on the keyboard. I don't like blasting music when I'm also having to read Chaucer. I think you seem "cooler" and more mysterious (therefore cooler) when sitting alone at Starbucks with a book in your hand, barely reading, mostly people-watching.
When I was in high school I used to avoid doing things alone (or being seen doing things alone) at all cost. I thought it was lame, and that I was a social butterfly who had a reputation to uphold. Being alone is for losers. Turns out, there's a difference between being alone and being lonely, the latter, fortunately, I've hardly had to deal with.
In the spirit of full disclosure, however, I will say that I've managed to go to the movies alone once. There were three other people in the theater and still, I was subconsciously a little afraid of looking like a friendless loner. Today, for instance, I didn't go to the Chanel trunk show despite really wanting to because there was no one to go with. I've never eaten alone in a restaurant. I've never gone to a bar alone. Fundamentally, I still prefer doing these things alone, so I watch shows on my computer with a box of takeout Pad Thai. I guess I still care about the appearance of things. I guess I still need to grow up.