Head up while monday is a tough day, its only a day it can only affect you if you let it.
As for your self-esteem your beautiful to someone your loved by someone and your cared about by more then your giving yourself credit for. Don’t get your head down pick yourself up shake off the depression do something totally different from the norm enjoy yourself and enjoy life. I can’t speak for everyone but I have been where you’ve been and I know its hard but something in your life has got to make you happy enough to want to keep living to actually do it. Don’t give up it may not be brighter tomorrow but theres always another day.