Nobody really cares if youre miserable. So you might as well be happy.
Unless we are some type of huge celeb, usually us being miserable over circumstances in our lives will only affect ourselves, and the closest circle of people that we may have around us, but other than that, truly, nobody cares. Why should they? I know that when I am walking down the street and someone looks at you as if they are in the worst mood, my natural inclination is to avoid this person, and I know that it is not just me.