Do I really have to sit somewhere other than by the window?
I don't know. Why do you need to sit by the window?
I don't like sitting with people, so I sit alone usually
I get that sitting by the window makes it so that you only have a person on one side of you. You should make sure no one else needs the window seat so that you do not looks selfish.
You're wrong. It's not selfish to want to sit by the window. If a people try to talk to me while I'm trying to write a paper, it's my damn right to tell them to fuck off.
I didn't say you were selfish, it will just seem that way to the other people, that you are looking out for yourself only. Then you will be uncomfortable the whole trip.