I find it surprising that you can let go physically but not emotionally. Not that I think this is a particular problem, I merely find it interesting from an academic viewpoint.
Just to let you know (as I am sure you do know anyway): Trust will come with the right person and at the right time. You both just have to have patience. The scars will always be there but they get less painful with time and care.
BTW, I really like you avatar!