How do you deal with people who have given no indication that they like you or even acknowledge your presence?

I am a gamer. Many of you know this, many of you do not. I am also female. As such, I have seen a great many interesting reactions to me in the gaming world. Most of the time, these guys get to know me a little and we become friends. Sometimes, guys never get past that first stage and they continue to ignore me. I do not know the motivation behind this. Some, I think, are afraid of me because I am a girl. Some don’t like that girls should play trading card games. Some are simply incredibly shy and don’t talk much to anybody. In one case, my wonderful boyfriend before he was my boyfriend said he didn’t want to overwhelm me because all of the other boys were acting weird around me.

There is a guy who I have seen a few times and who completely ignores me. As it seems now, I will be seeing this guy on a fairly regular basis. I have decided to give him the benefit of the doubt and try to find some common ground with him so that we can get along. How would the collective suggest I go about doing this?