Mom is trying to force religion onto me?

I'm 16 and go to a Catholic high school. I started having my doubts on god and religion for a while. I felt like I never really "fit in" with the church and it's beliefs and that I only tried to pray and go to church just to please those around me. I tried explaining to my Catholic, religious (and rather close minded) mom that I had lost my faith. She called me a "lost soul" and said "I would live without a purpose if I didn't believe in God". She's still trying to force me to go to Church, confession, etc. This isn't a little rebellious phase I'm going through either. How can I get her to see from my perspective on all of this?