When I say "annoyed", I mean miffed enough to raise an eyebrow, not raging 😆
I've been to a thing tonight where I was competing. BF was also there but competing in another group and with plans to go out to eat with team mates afterwards. All good, I saw him yesterday, we had lunch today, and are away this weekend. He can have an evening off! Usually at these events there's a bit of a mingle afterwards but we don't mingle together as we both have other people to catch up with.
Tonight I was chatting to a man I've met before when I went to an event out of town, but none of the other people there, including BF, knew him.
Unusually, BF came and kissed me goodbye as he left with his team mates, interrupting our conversation to do so.
Nothing wrong with coming and saying goodbye, a peck goodbye is perfectly nice too, but don't be marking your territory!