Embrace her world in totality. Don't just accept her. Do things to also experience what she experiences. Take the time and make the effort to live in total darkness for an extended period of time. Learn from her. She likely has heightened senses in other areas. What does she do differently to sense her world?
And share with her your world. Communicate. And I mean REALLY communicate. There are so many things we see that we never have to describe. He will have to care enough to want to be able to truly describe what something is to someone who cannot understand the visual aspect.
Learn all the tools that a blind person uses. Learn Braille. Learn to use a guide dog and walking stick. It's the same as if someone were deaf; the person should learn sign language and lip reading.
As with all relationships, the more a person understands the other and can literally walk in their shoes, the better they'll relate, communicate, grow together, and simply appreciate each other's company.