Yeah, I'm thinking your best best it to suck it up and deal until college. You don't mention any major theological/philosophical breaks with your church, just that you don't feel as religious as you used to. My mom dragged us to church every week until we left for college, but she had invested a lot in raising us Catholic, not the least of which was converting herself after my dad died.

When time, maturity, and distance have provided perspective, maybe the two of you can talk faith. In the meantime, hang in there.