I think starting with eye contact is good. Telling your T to show or not show emotions is not as easy as it sounds. Ts are humans, they won't just turn off every emotion because of a patient nor will they suddenly show loads. It's a balance and your T probably respects that you're more on the side of not wanting to see emotions, or at least were.

I have troubles myself with eye contact for a very similar reason. I'm scared my T will look caring and then I'll like him more, which sounds dangerous to me. I have talked about it a couple of times with him. At first we just talked about having issues looking at him, not even about the why. Since then, I've slowly started looking at him more. And I've found that he often gives an emotional reaction with his eyes or face. He'll look upset or sad or caring or whatever else. But I usually don't hear when he's sad in his voice, for example. Looking at your T can give you a lot of the things you're hoping to get from your T, so starting a conversation about that might be good. It can well be that your T already shows some emotion like that, you just don't see because you don't look.