<human>: As a person who has dealt with a feeling of constant lonliness, I had a real punch-in-the-gut moment today. I'm still a college student. I have this one "friend"/love-interest who I've always somewhat thought of as someone I can get closer to. Last semester, we talked a lot. She and I worked together on assignments, sat next to each other in lecture and in the lab too. I thought we were good friends. This semester, we have classes with each other 4 days a week. Usually, she would get to class later than me and settled for whichever seat is empty. I was hoping that we could sit next to each other like we did last semester. Today, she came a little early. My hopes were high. We saw each other, said hi, but I noticed she was looking around. And then she said, "I'm looking for Linda (her friend)." She found Linda and then sat next to her instead of me. My chest felt heavy, and I tried supressing it for the sake of focusing on my biochemistry class. But I feel like I should let it out here.  
  
I feel disposable as a friend. I feel like someone you would be friendly to because it is convenient for you. And that's the only purpose I have: convenience. It does not matter to you that you've impacted my life. When we're done doing our work, I'm left alone again, because you found new people to talk to. New friends whom you've recently just met as well, but they're better than me in your eyes. And the most I'll get is probably a Hi-How-are-you-doing. No hug, no we-should-catch-up. Nothing that would seem to suggest that you want to know more about me as much as I want to know more about you.

Can you give me the gist of the text in a nutshell?
<bot>: I feel disposable as a friend. My love-interest, whom I thought was a friend of mine, turned out to be less than what I though. I am clueless on how to keep lasting friendships.