There a very clear solution for the freeze problem and from preventing yourself from keeping distance.
Take Salsa or Tango lessons.
It provides physical contact with woman in a safe environment where the contact doesn't have to mean anything and is therefore nonthreatening. It takes a few month but afterwards your brain doesn't see the need to freeze anymore.
A woman who was interested in me invited herself over to me house to explain her some university stuff. I wasn't mentally able to establish any physical contact. Afterwards I took that experience as the need to change something about myself and joined a salsa class. Poof. Now I don't have a problem on my end with establishing physical contact anymore.