I am not alone, but i felt lonely..

Sometimes i wonder why do i have this feeling, im very sure that i was just thinking too much..but, i just can't get this off my mind. There are times that, i felt so lonely, that i feels that no one like me in the first place..no one really care if i'm here or not, no one would notice things that i did, and no one...would notice if i dissappear...sometimes i really wonder, am i worth anything to exist in in this world..