If you have not figured it out yet let me tell you geese are weird. I am going to guess that the goose that is hanging out with you is a gander since females tend to gravitate to a male even if they are not the "chosen one". If it is a gander then he has either picked you as his "chosen" or he is "cast out" because a more dominant male is establishing a harem of the females. This can change from year to year as they assert their dominance over each other. Last year my geese all bonded with one gander and they drove the more passive gander off alone. This year the passive gander had turned the tables and has taken all the females for his own.