I want to become mormon but my parents don't want me to. Mormon help?

The question explains it all basically. I know the church is true and i have meet with the missionaries 3 times and gone to church 3 times, and i have had countless conversations with one of my friends and her family and i know the church is true, and that the book of mormon is true, and that God revealed the plates to Joseph Smith to translate. And i believe in eternal families, and the atonement of Jesus Christ, that we may be made pure and holy so we can enter in our fathers kingdom. I believe in this and so much more i am just sharing this so you realize i am not some rebellious teenager trying to get back at their parents. I just need help. I was raised catholic, not to devout, but none the less we still went to church 2 times a month probably. My parents found the book of mormon in my room and i haven't told them yet because i was waiting for the right time, and they yea.... Well my dad said as long as i am in his house i will be catholic, end of story. I have been praying about it and will continue to. I am 17 almost 18, a senior in high school. I am unsure what i should do now. I am not a member of the church but i want to become one but my parents don't want me too. I am going to keep reading the scriptures and learning as much as i can, but i feel like i am ready to fully commit to being mormon and i feel like i should go to church but i can't. I am stuck in a situation where i need to balance honoring my mother and father, as God commands, but also following the truth and not letting anything deter me from it...