It might not be your best poem, but it's still filled with emotion and beautifully written. I keep forgetting your age when I read your stuff, it's all so mature and painful. And written by someone with great talent, that's for sure!
Oh, have you showed your dad any of the other stories you've written? Cause maybe that's a better way to start.. Your poems are kind of revealing, you are really pouring your heart out in them, which is beautiful and they are fantastic to read, but you might not want to reveal your most inner thoughts to your father. I totally understand that.. but sereiously, don't be afraid to show him your poems because of your writing, because that is absolutely wonderful!