Is something wrong with me?

I have a good life.Good grades, happy family, no diseases, noone has died.I have really good friends, and have a good attitude.But I feel like an idiot sometimes.Like if all the happiness isnt right, I need something worng with me.So I try to bring myself down.And everything that makes me mad or feel bad I just hold it in, then at some point I just get a rush of flashbacks and cry.Is something wrong with me.Because I dont think tha I am depressed.