Again, you are completely ignoring the text. Jesus said, "I will build my Church', not 'I have been building' or 'I am building'. Plain English indicates a future project and Acts 20:28 reveals that it was Jesus blood that purchased His Church...
Acts 20:28 (KJV) Take heed therefore unto yourselves, and to all the flock, over the which the Holy Ghost hath made you overseers, to feed the church of God, which he hath purchased with his own blood.