Family holding grudges

I'm 16 and I pranked messaged my 33 yr old uncle this April fools. I spanned his box with one letter mail and told him to stay away from my wife. I used a caller id changer app and told him it was me. I had help from my family but they don't want him to know. So when I go to his sons 1st birthday today he attacks me then starting cussing. I heard of holding grudges but hes being childish with it I'm not the only person in the family he has grudges with.  Hes one of my favorite uncles but I don't feel I'm in the wrong. What should I do? I  went home after this since I live 5 min away.