BOYS! How do you act when you like a girl? Romanticly and friend wise? ?

So I liked this guy a lot and we talked everyday the entire period we shared together and it was great. We didn't talk otherwise tho. Only in that cl. I only liked him as a friend at first but then suddenly these feelings ignited later. I thought he might like me to but I wasn't sure if it was just friend wise...so my question to boys only is how do you guys act when your around the girl you like?