Read this is from a guy

Ok. Many tips from here are good but I,ll tell you something you may don,t know: men are vulnerable . Really. If he likes you he may don,t want to show it in case you don,t and in this case he might flirt really subtly. Like looking at you very often, try to befriend you and to make you laugh. This is very important cause if you don,t laugh at his jokes he might have no hope and stop trying to let you see he loves you.