Faith is all about believing in something regardless of proof either way.
I have faith.
I have faith in humanity.
I have faith in the universe.
I have faith the the power of love.
I have faith in a higher power (which in my perspective is the unison of all that exists).
I have faith that the story of Jesus is true in many ways, and that this story can do all sorts of wonderful and even miraculous things for the world and all the people in it.
To me, Jesus is a role model, whether real or fictional.
Jesus is a role model who teaches us all about love, and forgiveness, and unity.
He teaches us that every living being has the opportunity and ability to help and heal and love and perform miracles in the lives of others.