Is it bad that i run faster when i carry the football?

It's bad man, you gotta give 110% on every down if you want to succeed. The guys who play in college and in the pros are all giving everything they got on every play. Even if you're a receiver blocking on the backside of a sweep or something you gotta give it all you got.

I think everyone tries harder once they have the ball, its not bad, its just the want of scoring. Its a good quality to have, but you should give 100% on every down. But nothing wrong with it, most people perform better with the ball, then without.

Drop the ball and see if you still can still run fast.

Not on the football field. Sometimes we need some motivation to bring out something extra within ourselves.