He makes for new company among the same people.
He's rich and it would benefit the family to have one of her daughters wed him.
He's a new young male who she could have an affair with.
She can't wait to get him settled in and acquainted with everyone.
He exudes an air of superiority when he is among those beneath him in stature.
He is not as attractive as he appears from a distance.
He compliments every woman that passes him.
He tells elaborate stories to entertain the crowd.
One of the wheels is broken.
Jane's just one person and doesn't need a whole carriage.
If Jane is exposed to the rain, she'll get sick and will have to stay under Bingley's care once she arrives.
A horse by itself is faster than with a carriage and Jane can get there faster to start spending more time with Bingley.
She hopes to make herself more appealing by making Elizabeth less so.
She's venting to Darcy because her brother won't let her.
She's making a game seeing how many things wrong with Elizabeth she can point out at once.
She hopes Elizabeth will defend herself and build character.
He doesn't believe his feelings are real and thinks they will fade soon.
He lied to Caroline because she's the one he really has feelings for.
If he never says it again, he can forget about it.
He doesn't want to pursue a relationship with someone beneath him in society.