Could I get into an ivy league?

I am going to be a sophomore this coming year at a private school in the suburbs. This past year, as a freshman, I took the the three honors courses that are offered for freshmen (physics, geometry, and spanish) as well as history and english. My final grades were a B+ in history, B in geometry and physics, and A- in spanish and english. I participated in two theatre productions at school (during the winter and spring) and contributed to three clubs. Next year I will be in all honors, except for history. If I move up to AP history in the middle of next year or do all honors my junior year, what will my chances of getting into an ivy league or the equivalent, or even Oxford or Cambridge be like? I haven't taken the SATs or PSATs or anything like that yet but I will next year. Please keep in mind that I will have 60 hours or more of community service by the end of my senior year and most probably three activity credits for each of my sophomore, junior, and senior years. I also plan to raise my grades next year, as I am not particularly happy with them at the present. Oh and I think my grades make my GPA about 3.7. Thanks for helping!!!