Guy says he only dates girls from his school?

[Emmy]

Okay so my best friend like my cousin and told him that she liked him through twitter. He said that she was very sweet but that he didn't want a relationship at the time and wanted to date girls from school. What could this mean?
He also said sorry if I ever appeared to be mean.
Thanks for the answers and Happy Valentines Day
They also live about 20 minutes away from each other.

[Block Due]

It means that he doesn't like getting on the bus and wasting alot of his time to see a girl when he can just get one at his school. She is just backup if anything goes wrong at his school.

[Vince]

He knows it wont work out if they dont see eachother often

[Nancy]

Doesnt like long distance relationships