I agree we absolutely can't diagnose or even speculate, the best we can do is support you - many of us have given our own experiences, how you are feeling is not unique - many of us have had that 'disconnect' in our lives.

You are describing what sounds like a lot of anxiety in relating to others, and I understand how that feels, it does tend to mean interactions are under more pressure. Are you seeking out ways to address the anxiety you are feeling (you wrote when walking/talking/eating)?