What if it ruined her entire day at the fair?
That's awful. What ruined her day at the fair?
I ignored her and did my own thing.
You shouldn't have ignored her, it's wrong to ruin someone's special day. Next time treat her better.
Nah, I'm too busy doing my thing and living my life to focus on her or other people.
It is okay to live your own life but you shouldn't have ruined her day by ignoring her. You could have at least greeted her or spent a little time with her.