How do I tell my Grandma about my boy friend?

I'm Thirteen and I'm allowed to date (I live w/ my grandma) but I'm not sure how to tell her abotu my BF. We've been dating for a month and we love each other but I feel like shes going to over react because he live in Chicago and I live in Lansing. I don't care about the distance like some of you insensitives who will say "play with some local chap". And just because I'm thirteen doesnt mean I can't love. (I beleve that there are different levels of love and I am defeninately in love :)) He comes up just to see me. And he makes me happier than anyone esle can.