What makes a person boring?

I’m occasionally told I am boring. The conversation usually goes something like this: “Wanna come down the pub on Saturday?” “Not this week, thanks” “God, you’re so boring. You never come out.” “I join you one weekend in four. That’s not ‘never’. What did you do last weekend?” “Went to the pub” “And the weekend before that?” “Went to the pub” “What will you do next weekend? Go to the pub?” “Probably” “See. THAT’S boring.