What are some signs that a guy likes you? (guys answer only please)

what are guys really thinking when they like a girl? what do they do to show that they like them?

Different guys have different ways. I would say that they would stare at you alot, try to make you laugh, always try and be around you and follow you around alot.
They might try to be mean to you also.

It's about what they're feeling rather than a logically thought out process. For that reason, they often do silly things to attract your attention, show off and/or try to impress you any way they can. Their logical mind meekly says, "be cool" but their hormones override their logic with an uncontrollable dose of "goofy." :-)

When I liked this girl I tried to talk to her a lot. I also always listened to what she said stared into her eyes when she was talking. I also looked at her a lot and tried to nice things for her (i.e. letting her have my chair)