I Stopped Calling When He Became a Woman

Are we at a time in the universe where everyone knows at least someone who has 'transitioned' by gender presentation? In my earlier years of learning of this process, we were taught the terms, pre-op, post-op, and no-op. Some transitioning persons went through one or a combination of them.
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I met him decades ago (during the early- to mid-1980s). I was working as an office temporary (a temp) at the Bankers Trust Company in Manhattan. He was responsible for formulating questionnaires that were used as tools to get potential customers/investors. I was a word processor or worked typing on a word processor. He was friendly and we spoke quite often.

He was a vegetarian (or maybe a vegan?) and came to New York in the 1960s from Iowa to study music.

Eventually, he had left BTCo to become a music teacher. After years of service teaching and writing extensively about choirs, he retired and then decided to become a woman.

I never asked her about her feelings during those years as a man. What brought it about? What made you want to make such a drastic change? How has your life changed?

She, of course, never really reached out to me. We became those friends that you have at xMas time when a dime store card is sent with a few generic lines of good cheer and joy in the new year.

Is anyone at fault? I don't know. I sort of lost interest. I also didn't want to struggle with watching my mouth. Sometimes there are people who enter your life who are not necessarily going to be there forever. I guess he or she was one of them.