May I interject here to say that not all Buddhists are isolating and detaching to reach Nirvana. The Buddhism that I am familiar with is based on the belief that we are all connected and not just with each other but with the entire universe. Recognizing that attachment/connectedness is key to the philosophy. In order to reach the ultimate state of Buddhahood, one must first experience the state of altruism through helping others. The state of Buddhahood is defined as the absolute happiness derived while engaged in that altruism. I can't see how anyone could achieve Buddhahood staying detached from the world or humanity.
Hopalong, IMO your friend's need to have you scoot back and give him space has less to do with your need for attachment or Buddhist "detachment" and more to do with his own inability to be comfortable with people in his "space." It could be a cultural thing or just the way he's wired as you say. Which is fine, except that it sounds like he tries to make your natural wiring out to be faulty by wanting you to change.
Could it be this is an incompatibility between you two? My husband and I are both very attached, physical, cuddly and in each other's space all the time. When we sleep, we are like a pretzel. When we watch TV we are wrapped in each others arms. When we walk down the street, we are embraced or holding hands. In fact, there is hardly any time when we are together relaxing that we are not entwined somehow. Some might find this odd but it works for us because we are both wired this way.
Bewildered, I know that feeling of being stunned into paralysis. This is not uncommon. I think that when someone is attacked unexpectedly, the immediate physiological response causes our chemistry to explode causing confusion. Not everyone is wired to go into fight response Perhaps it is an aborted flight response that we experience. We want to run but circumstances don't permit and so we stand there stunned. I find that happens to me more often now. In the past, I never hesitated to go into fight response but over time, I've learned to control my immediate response, but the adrenalin is still rushing.
CeeMee