Depression / realisation?

[readyforthefloor]

My friend has recently noticed how all humans are so selfish when it didnt seem so obvious before and since noticing this their views on all of their friends have gone downhill.
As well as this her best friend has got in to drugs a lot more and isnt the same person as before. Another realisation came...it was how alone each and every person is in the world and how you do have to be your own best friend.
After all of this she can't stop crying whenever she thinks.
She's sick of her life, all of its activities are college and going out and taking drugs, she needs to find a hobby or a boyfriend, being lonely is horrible.
Has any body else had these feelings?//what did they do?