coach miles dilemma

let's see, do i leave my current girlfriend or go back to my old girlfriend. my old girlfriend shunned me in the past because she said i wasn't mature enough. i have always loved her and have dreamed about us getting together. now she desparately wants me back and is willing to prove it. my current girlfriend, oohlala! when times are good, she's the best! but boy she can be bitchy at times; insecure, loud and obnoxious and just bitchy. but right now she's oohlala, the best. she really wants me to stay and is willing to prove it. i love them both! what is a man to do?