What does it mean when a guy gives you a big smile?

[Anonymous]

i was talking to this guy who works at my university, no he is not my teacher.

i saw him in the hall and he started talking to me. then at the end he flashed me a big wide smile. he was making eye contact the whole time.

he usually is the very serious type, but he always gives me a big grin.

[Cottoncandydreams]

he is being friendly, making himself availabe for conversation. He coul find you attractive too that's a plus.

[Racez]

It means that he likes you as a person. Great guy.