Why do I feel so lost?

I feel the exact same way. like it would be better if i was invisible. most of the times i avoid people and just sit somewhere, ditch class/responsibilities and barely talk to anyone. or when i do i get so anxious that i feel i deserve being lost and no place to belong. i sit in the dark corner of the exit, inside forests..anywhere where there is no people. its driving me insane and im going insane actually. like fuck! i wish it was so easy to die. but there is a way