Is this unrealistic expatiation when it comes to dating?

       I have autism one of the symptoms I have is I naturally don’t show emotion on my face. When I was growing up I trained myself to show emotions on my face, because if I don’t physically show emotion people keep thinking I’m either angry or not interested in the conversation.
        When I’m interested in dating someone. 

I usually stop showing physical emotion and just relax my face around them, because I want a partner that I can be relaxed around. With people I’m interested in dating I will once in awhile show emotion on my face to communicate with them more clearly. Is it unrealistic for me to expect a partner to be okay with me not showing physical emotion on my face?