hi fren. you said you always feel said and don't know why. I don't want to jump to conclusions and say that it's depression or if you are going through puberty,hormones (sorry) because these are real feelings. turn to the web and look up existing articles about mental illness and constant sadness. if you need help, talk to someone. also, if you need anything, please come to me. I'll be glad to talk with you or give you advice if you ever need it.