Let Me Go

I dunno I just feel so sad.Really cannot find out what is one solid reason. May be because of my life???I just do not know. I have friends I have family behind me but why I am still sad and miserable? Why I am not happy?I think I need to go.Go find my happiness. I wish I can be a selfish kinda person just let go everything and just care about myself. The truth is I just can't do that. My family is my priority. What hurts the most for me???See my family and friends not happy. That is my biggest problem. I cannot think about myself but I love them all. What to do???