How annoyed am I?

So, I used to have this friend. She was awesome. We were actually best friends for quite a while. And now I have no idea who "she" is. I say that because she is now a "he".

She dated my sister, and actually didn't know we were sisters. When she arrived at my house, she said to me "Why are you here?" and I was like "... I live here?" It was actually quite funny. We were best friends in 11th grade. We were together basically every weekend, we had the same friends, and we had the best inside jokes.

Then college happened. I visited her twice the first year she was there. Then she transferred schools to UGA, and turned into a different person. The last time I saw "her" was in 2007 at a friend's birthday party. And now she has made the transformation into a male. She no longer has a girl's name, but a male's name instead, short hair, and I am sure is on the testosterone shots.

And we are no longer friends because "he" removed me from his life completely.

I guess we weren't such great friends after all. I'm not sure why this happened, but he never gave me the chance to try to accept him as a male and understand why he made this choice. And that's what makes me the most angry. I would have given him a chance. But I know he is not the same person I knew back in high school, and so maybe it's for the best.