I need bowling help

I really need some bowling help.  My game is just sad.  I go bowling with my friends and they always beat me.  I rarely break 120.  What am I to do?  I love to bowl, but I just don’t have the ability in me.  I have practiced and played many games.  It makes no sense.  My friend Rob hardly ever bowls, and he can just pick up a ball and bowl a 150.  And my brother in law is just amazing.  He bowled a 279 last weekend.  He only missed one shot in the 5th frame or he would have been perfect.