Vanessa, what you say is true: Loneliness is a nasty cycle that most of us go through at one time or another. All of us experience it in this forum, or else there's really not a lot of point in us being here. It sounds like you manage your feelings well, and find solice in helping others with similar feelings of isolation. That's great! Welcome to the forum, by the way...
Chris, sigh... I wish you were nearby. It sounds like you need to be around some people who can let you just "be". You don't need people who don't care about you trying to take you on as a "project" or something; you just need some sort of niche. It sounds like you also want someone to take the lead on this, as you constantly report how difficult it is for you to make a first step. We get this, as many of us are a bit intraverted and experience anxiety. I've read many of your posts, and didn't quite know how to respond differently than anyone else. However, know that we're with you, and wish you the best. Just survive one day at a time, and your circumstances will eventually change. College can make anyone feel isolated; it's tough being around thousands of students you don't know or care about, and trying to feel "part of it". I hated university, but eventually I got a job and feel comfortable with a small circle of my coworkers.
Something else to think about... many people would appreciate a genuine conversation. Lots of us could use someone to talk to once in a while, and somebody who offers a compassionate ear in exchange for the same is usually welcome in many circles. The next time you find someone sitting alone or who seems to be lonely, just say hello in passing. If they reciprocate, wonderful! Ask another question, listen, wish them well, and find somewhere else nearby to sit. If the conversation dies out, so be it; you made a brief connection and extended your confidence. Sometimes people will talk because they are bored, and the more genuine and open you are, the more they may seek you out in the future.
Some of us give off "needy" vibes at times. This isn't a bad thing, because it's a way of seeking the companionship we desire. However, take it slowly when developing a new friendship... wait a bit before expressing the totality of your feelings.
Hope this helps... feel better.