Why do I like to each my self cry while in a depressed mode in the mirror?

I think I suffer from depression....and I just start crying in my room cause I dOnt like other peoplenknow that I cry. And some tomes I think that I'm such. Fun person and nice person and o try to make very body laugh... But when I get home I start to think why some people don't value me as much as I need to be?