I had to learn the meaning of non-verbal communication. I noticed it but for me it was more like a foreign language when I was younger.
...but languages can be learned.
I guess there are a least two options.
You are not interested in understanding non-verbal communication or you are interested in it but it's difficult to understand for you.
Aspergers might be a cause... but I'm not a specialist to do a proper diagnosis.
The questions is, does this cause problems in your life, do you suffer from that circumstance?
...and I guess I de-rail this thread thematically any further...