You were Chandler's older sister, and you were considered one of the guys to them

You were sat down at Central Perk when Joey and Chandler came in and sat next to Ross "Happy Birthday, Ross, we got 4 tickets to hockey and you're coming" Joey said "My birthday was 7 months ago. Which means you couldn't decide who got to bring the date" Ross said

You laughed, and soon, the four of you were heading to the hockey game