Was it right for her to tell her boyfriend about me?

I have this friend who, when I came out to her, proceeded to tell everyone she knew (and people she'd just met) I was trans when talking about me. And when I found out, I flipped out on her and told her that that was completely unnecessary. That coming out to her was for her and no one else and from there on out, I didn't want anyone else to know. I told her, when you talk about me, I'm Alex. That's it. No "(Birth name) who goes by Alex" because that confuses people. So I'm pretty sure she never brought me up to anyone again but then she got this new boyfriend and she said when she talked about hanging out with me, he'd wonder what our relationship was really like. That if I was her guy friend, did she have feelings for me and that kind of thing. She'd keep telling him no and that we were best friends and that's it, but apparently her boyfriend was still worried about it so she told him I was trans just to ease his mind. It's been awhile since this happened but I still think about it and wonder if she was right to tell him about me. What do you guys think?

 

Yeah. There are so many things she could have said instead of outing me. Luckily I don't hang around her often. I really don't even know why she still considers us 'best friends'. I barely consider her a friend anymore.