Let's all try to give out tips of how to know if a guy is gay and likes you..
The reason I believe no one really can answer this is because...unless he tells you he IS gay, you can never ever really know. (*yes I know the kinsey scale theory-but more men identify as straight and feel comfortable in their sexuality) I know from personal experience that Men flirt with each other without even knowing it and think of it as nothing more than brotherly bonding. Some men even like to flirt with gay men because they like the attention and the self-esteem building it does for them. Men have complemented me and flirted with me in ways that I can't believe they do not see as gay. Thing is...all these men are completely straight and in their mind- there was nothing sexual about it. If they do same thing to a woman- it triggers something sexual for them.
Smiles, nervousness, sitting close to you, complementing you, perking up when you come around, hugs, wrestling, going out of their way to talk to you, inviting you to everything, long late night calls, holding your hand, needing your attention etc etc etc.....In my experiences...means absolutely nothing....all have girlfriends, all love woman, all think you are straight too.
Until you tell them, Until they tell you....you just never know.
Ha-Ha, In my case I tell them I am gay, they tell me "dude, sorry man, I can see how it came across that way because you are but I'm completely straight- I'm not gay, I'm sorry you misread me but I hope we can still be friends."