AITAH for taking the bus to work?

I take the bus to work and it's a 2 hour trip for both to and from. I don't complain or say anything to coworkers or family. I got off the bus one day and went into work. A coworker of mine said that she noticed I take the bus to work and she tried to offer me help. She said that she lived nearby and could carpool me to work. I didn't say a single word to any of that and simply continued working. She went and complained to my coworkers about how silent I am and they said that I'm really weird and anti-social. I don't understand. My commute is not her problem. AITAH for ignoring her?