Take a deep breath.

recognize that (as someone once told me) YOU are your own best friend. even when you don't feel it. I do like to spend time in my own company. but liking to "BE Alone" is not the same as lonliness. as I have been told that the human creature is a social creature. no man is an island. problem is we DO try to live that way. (an island) why else do you think I am the "Stranger in the corner"? we all need comfort, support, contact with others even when we do not think we do. if like me you don't really have anyone to turn to, you can always remember that "You Are Your Own Best Friend!" take a step back from life, (under that tree is a good place) and in your mind talk to yourself. actually hold a meaningless conversation with yourself while realaxing under that tree. (kinda like pratcising for a Q&A in a debate, but entirely meaningless material) after awhile the feeling while not completely gone, does feel less crushing.

personally I do this pretty much all day long, yes even now while I am typing because it staves off the lonliness a little, and helps organize my thoughts and focus.