Is my partner autistic?

Hello I am Catherine. I am in a happy relationship with my partner of ten years.  I love him very much but find his behaviour and ways very challenging.  I am the most understanding and patient person I know but at times find him difficult to understand. I think he has Aspergers but he won't think about exploring it further.  To help me to find out more and accept him for what he is (understand him) what would you suggest?