It does happen for guys too. We all did it when we were younger and it scared away every girlfriend we had, so I don't think it shows as much or as blatant when we get older. He will certainly put the time, effort and work in if they are swept off their feet so to speak, and he won't pressure, or won't care and be very laid back about it. Because they are just happy to spend time with you. Those should be two things to look for I guess.
Waking up next to a beautiful girl,
Step outside and say hello to my beautiful world.