If you don't want people to think that you joined just to get guys, then don't flirt with all the guys and be serious about the sport. Unless they are turds, people will see that you are on the team because of other reasons.
About your guy problem: For now, I'd probably lay low. I mean still have a presence in his life, but don't do or say anything that flatly tells him that you like him. Since he thinks you're already cool, you can start building up a nice friendship from there that could eventually evolve into a romance. But don't rush it. If you do rush things, you're more likely to end up getting burned. Just gradually get there through light flirting and getting to know each other better.