There are days where you just want to lay in bed, and that's fine. There are days where you just don't want to fix your hair and do your make-up, and that's fine. There are days where you'll be sad and lonely, and that's fine.
Life wasn't meant to be happy all the time because if it did, then we would never appreciate the little things. The small stuff that makes us smile and the people around us that make us happy. It's okay to have bad days, but don't let those bad days dictate your life.