How can I come out of the closet after... this?

The past few months, I've come to the realization that I'm bi. I got so caught up trying to work things out myself that I began to unconsciously push everyone away, including my very best friend in the world. Time has just flown by- I've been waiting for the perfect moment to present itself to come out to my crush, and I've just gotten so caught up with trying to get my act together that my friend has separated herself from me. She's completely estranged from me and claims she doesn't have much faith in our relationship being restored to what it once was. At this point, she's agreed to talk it over, but I have no idea what to say. I can't just say "Oh, hey- so the reason I haven't talked to you or anyone else very much the past few months is cuz I was overwhelmed by my sexuality being in question and couldn't get my own **** together." So, any ideas of how to approach this? I could pour my heart out and be completely honest- but I question if that will be enough. What should I do? ;_;