To carry on: I think it's to do with how people are socially. I have somehow managed to kind of get myself into a "clique" and I'll try to explain how, which I hope helps in some way.
I'd advise not to do this. It puts people in an awkward situation if you're openly negative. They don't know you well enough to say anything, really. I know it's said a lot, but stay positive with potential friends. They may not be inviting you because they see you as a "downer". You need to phrase it differently. I'd advise you to keep up with upcoming events, and ask these people if they're going. I think that'd be better received.
I think that comes into "students only say the bare minimum" - they're just trying to get on with it rather than have a conversation, so they're getting annoyed at you, I think. I'd advise you to look at what others are doing - if nobody else is talking, don't try to make smalltalk.
I'm speculating here. One thing is that it could be they want to talk about other things. Another could be to do with what about the work you're messaging them. Are you asking questions on how to do things? If you are, they could be frustrated with that. I personally answer people's questions rather than ask my own.
You may not have looked open enough in terms of body language. Did you look in anyone's direction?
Is it possible to develop these into friendships?
I know it's easier said than done, but try not to. With some minor changes to your social approach, you should be able to make friends. You don't seem odd or rude.