So, here's the thing. I'm trans, and my younger sibling is also somewhere under that umbrella, but I'm not sure where anymore. (I will refer to them using they/them cause last they told me they were enby). I came out to my friendgroup in June, and told them my preferred name- Ajax. One of our other friends joked that my new nickname should be Axe. My sibling went, 'what, like the body spray?' and we all laughed. That's how I know they were there, unlike what they say- but we will get there later. My closest and oldest friend said, 'AJ is a better nickname.' And so, from there on out, that was my name. For a completely irrelevant reason, my sibling was eventually kicked out of the friend group. A few weeks later, I discovered by accident that they now went by AJ. I brought it up with them, explaining how that had been my name since the day I came out. They told me to deal with it. I brought it up again yesterday, and they agreed to change it. But now they won't tell me their new name or anything about themselves. It's upsetting, since we were so close as kids. I feel really, really guilty for making them pick a new one. However, the reason we kicked them out is the real kicker. Their whole personality since we were tiny is mooching other's interests. If I liked something, she either loved it or despised it. This continued into the friendgroup, making everyone uncomfortable. And when we explained that, many times, they ended up out of the group and with a bunch of new friends. Am I in the wrong? I feel in the wrong. I feel really bad.