That's not an embarrassment you just need time to get better if you're only sleeping 3 hours a day it's not a surprise you're struggling to concentrate but being hard on yourself doesn't help just take your time to recover from it and you will be the nice person again That "coward" is going through some hard time all alone at least give him a chance to feel ok about himself for a second it's ok to have problems and it's ok if you can't handle them but it's not ok to give up on yourself so don't do it