Question: Is Jesus the only way?
Answer: Yes. This comes from Jesus Himself, “I am the Way, and the Truth, and the Life; no one comes to the Father, but by Me.” (Jn 14:6) If we hold that there is another way to God, other than Jesus, then we are calling Jesus a liar. Also, the only reason it is possible for Jesus to be the bridge from the human to the divine, or from this world to the supernatural world, namely heaven, is because He is fully human and fully divine. That is why Jesus is the “name above every other name, that at the name of Jesus every knee should bow, in heaven and on earth and under the earth, and every tongue confess that Jesus Christ is Lord, to the glory of God the Father.” (Phil 2:9-10)
Now, if the question that follows would be, “What happens if someone never knows Jesus”, the answer is simple. Any person who by no means of their own doesn’t have the opportunity to come to know Jesus but faithfully seeks Truth, Life, and Love then they are seeking Jesus, even if they don’t know Him by name.
Check out what the Catechism of the Catholic Church says in paragraph 51-53, 151, 754, 2609.
This is a very important and foundational question. If there are any more questions that come up from this answer, feel free to ask.