How to gain weight..i know it's a silly question?

Well, I'm super skinny and at first when i was younger I was "OK" with it But now as i ' m older i want to gain weight..i eat a lot everyone says it but i don't know what's going on. and everybody well some of them say i 'm bony skinny and i don't like it , it makes me said inside even though people say i should take it as a compliment but it's not to me i ' m crying as i write this anyway any ideas??