OP everyone gets sad once in a while. but thats not depression. depression is a sence of loss, hopelessness and extreme negative emotions (depressed, angry, suicidal, grief, self hate, ect.) its long periods of time where u think nothing can possibly go right and actively but subconsiously sabotage ur own life. and things u use to enjoy dont appeal to u anymore.. nothing does. im tired of p think depression is just sadness or 'a rough patch'