"I would drive a few miles for a hot stud like you," Foley said in one message obtained by ABC News.
The FBI says it has opened a "preliminary investigation" of Foley's e-mails. Federal law enforcement officials say attempts by Foley to meet in person could constitute the necessary evidence for a federal charge of "soliciting for sex" with a minor on the Internet.
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In another message, Foley, using the screen name Maf54, appears to describe having been together with the teen in San Diego.
Maf54: I miss you lots since san diego.Teen: ya I cant wait til dcMaf54: :)Teen: did you pick a night for dinnerMaf54: not yetâ€¦but likely FridayTeen: okâ€¦ill plan for Friday thenMaf54: that will be fun
The messages also show the teen is, at times, uncomfortable with Foley's aggressive approach.
Maf54: I want to see youTeen: Like I said not til febâ€¦then we will go to dinnerMaf54: and then what happensTeen: we eatâ€¦we drinkâ€¦who knowsâ€¦hang outâ€¦late into the nightMaf54: andTeen: I dunnoMaf54: dunno whatTeen: hmmm I have the feeling that you are fishing hereâ€¦im not sure what I would be comfortable withâ€¦well see
Foley resigned Friday after ABC News questioned him about the Internet messages.
He says he has checked into a rehabilitation facility to deal with alcohol and behavioral issues.