How to get fat and healthy?

Actually i m very soft hearted...i don't like people being rude to me...so wen anybody talk to rudely or with high tone..i feel very low and depressed..so i get weak..i don't like eating food for all day..i just like to sleep and cry..n always feel that nobody loves me..what should i do to again get healthy and good looking..?If there is some excersise which i can do?please help me..