Is Jesus the only way?

Quite simply 'yes'. That's not an arrogant thing to say - He said it. And since he came and gave his life so that people could get to Heaven, and since he governs who gets into Heaven, and since Heaven is his home, I think he has the authority to say what the way to Heaven is. In fact to suggest that there is another way to get to Heaven that doesn't involve the death of God the Son, is a slap in the face to an infinitely wise God.

Jesus himself said, "I am the way and the truth and the life. No-one comes to the Father except through me." (John 14:6)

He also said, "whoever comes to me I will never drive away." (John 6:37)