Hearing someone say I love you when you are having a bad day

Sometimes I have a day of negative Nancy, downer Debby or sad Susan. I don't always know why but on these days all I want to do is curl up in a ball and hate my life. Sometimes I cry or listen to some sad music to make myself cry. Definitely not a fun day in my eyes. On occasion, I will go for a walk to clear my head and try and think up why my life is a glass case of emotion. But nothing ever makes me feel better. It is pretty pathetic how bad I feel for myself for no reason at all. Knowing this I also want people to feel bad for me or comfort me in anyway. But with me not knowing why I feel so down, it is hard for people to help. They say "I am sorry I don't know what to say" "Why do you feel so sad?" "I don't understand, I'm sorry"... "Well if it makes you feel any better, I love you :)" Yes, in fact that does make me feel better. A lot better.