What happens next?

How to relate to an autistic person
Recognize the emotional challenges autistic people face.
To relate to someone requires that you know where this person is coming from, so it is very helpful to learn about the challenges an autistic person faces. They may have trouble reading your emotions, or they might read your emotions but not be sure why you feel that way.
In addition to this confusion, sensory issues and introversion are common, so socializing can be tiring. But the sense of a connection with you is still likely very important to them.