Every year I go and visit my step-siblings in Glasgow (we live in Bristol). My partner came last year and met them all. We go the same weekend every year. This is the only time each year that I see them.
My partner has told me he is going to go away with his dad instead. He's going to a city that I wanted to go to for a long time, and we had vague plans to go to one year. He said he'd love for me to come, but knows I have the visit to Glasgow. He suggested I do the Glasgow weekend a different one this year, but usually I go up for my brother's birthday.