Ex-etiquette: Boyfriend was wearing a wedding ring at work

Q. When he walked into work, I noticed he was wearing a wedding ring. He had an early Zoom meeting and went directly into his office. When the meeting was over and he came out, we chatted for a while, and I noticed he was no longer wearing the ring. He just told me he loved me last night! Is there any other explanation other than he is married? I can’t think of one. What is good ex-etiquette?