Replying to I need some help all you ladies men!!!

Im not one to come onto newschoolers and ask for help about a girl but im stuck so I have no choice. So theres this girl who I like and have been talking to for a while and she seems to like me also. Today at the varsity game I find out im not the only one shes into and I was pretty disapointed to here this. They seemed to be talking alot at the game and I didnt really know what to say to her so I just kind of kept quiet. I told her I wanted to talk to her tonight and Im planning on just telling her that I really like her and just find out about this other kid. Is this a good idea and if so is there anything else I should ask her about or anything else I should tell her? Thanks NS.