How do you position yourself?

Say a girl is in a window seat where's the ideal location for you?

Do you sit next to her? How? Ask for permission? What if the are other empty seats nearby then it seems odd.

What about same row? I've tried this one but the distance seems sooo farrr. It's hard to converse.

Standing nearby? This one seems interesting. Haven't tried it.

Any bus game god wanna drop some tips?