Just thought I'd add a little towards this since I also experienced these feelings for years. For one I believe this is a good time to get to know yourself instead of someone else...just while things are slow. I feel like I searched for years to find new friends because of situations changing in my life...friends having kids, getting married, focused on a boyfriend etc. I had my therapist introduce me to a couple girls she thought I might have something in common with. One of them is still a good friend today even though she is not my "best" friend. But today I don't think I have one "best" friend. I have multiple friends I go to for different things. Another friend of mine now I met through a different friend. I'm so for "the more, the merrier". I totally know the feeling of everyone being "too busy". I spent a good year plus...going out with people I'd consider acquaintances which at times felt uncomfortable and a little depressing but at least I was getting out. Things really can change and then swing back and forth. When you are feeling better just do things, join clubs, try to meet friends through the internet. Find a good hobby. There are lots of things we can do that are interesting...which make us interesting...not just to other people but to ourselves which curbs that loneliness. If you can't go out a lot...learn some spanish on the computer...anything that makes things more interesting.