He feels the Lord has told him she is the one. Let me share a story that I believe helped him, and I hope it will help you with whatever it is you are struggling with today.
I am going to do a mixture of paraphrasing and quoting directly from Numbers 13 and 14. Let me set the scene. The Israelites had been in captivity for centuries in Egypt. In a miraculous move, God had brought them out of the land of Egypt. In his mercy and love, He wanted to take them to a new land flowing with milk and honey. He wanted to take them to the Promised Land. However, a land that beautiful, lush and productive was already occupied. Therefore, when the Israelites arrived, they sent out 12 spies to go and scope out the Promised Land. What were they up against as they moved into enemy territory and claimed what God wanted to give them?