i'm not sure

[g-rex2908]

Ok, so i've been consistantly spending time with a girl I have been working with since last October. We started off as friends, joking, having fun at work. Then around mid Jan, we started spending time with each other on a one-on-one basis. Basically from mid jan to now I have had her over, or taken her somewhere exclusive with me every week. We kiss and act like a couple when we are out in public. When I see her I give her a hello kiss. When we part ways I give her a goodbye kiss. One side not I should bring up is that we both work at a gym, and one of the guys there is kind of touchy-feely with her. I am too, of course, but I had a discussion with him a few weeks ago making it clear that her and I were "talking". Sometimes he will grab her hand, or aggressively kiss her cheek repeatedly. When I see this my mind goes into a frenzy, but I don't act out really, because I don't want her to think I'm intimidated by this guy. I'm not sure if I should say something to him about it and tell him not to touch her like that, or what? I kind of hinted to her about it when she was over, and she said that it bothers her when he does that. As far as I know everyone at work know that her and I go out, so he should know how "not to act" around her. Another thing is that she invited me to go with her and her best friend on a cruise, but I declined because I have a lot going on right now. The last week she invited me to go bowling with her brother, her brother's wife, and their kids. I'm not sure if I should ask her to be in a relationship now, or wait longer. I don't want to ask too soon, and get rejected, or wait too long and have her stop wanting to spend time with me. I have gotten to know her a lot from our interactions, and things have progressed very naturally. I do know from what we have talked about that it takes her a long time for her to "like" someone. I just don't know where her and I stand. Please someone shed some light on this confusing dilemma. Thanks!