PlEaSe HeLp I ThInK Im MeNtAl!!!!!!!!!!!?

ok so the last couple of weeks i have lost ALL of my friends bec. they think im dumb and stuff! anyways... so i keep on seeing these ghosts from the past and one time i EVEN saw an alien! and one time i talked to elvis and my friends were RIGHT THERE and they didnt see him, and they thought i was crazy! PLEASE HELP ME!!!!! IDK whats happening 2 me! im only 17!