If a man hugs you with one of his (preferably left) hand under your head and embraces you with his other (right) hand, it means you're in haven. The logic is simple: The left hand under your head means he'd protect you from every unpleasantness and keep you safe, and with his right hand, keep you close and care for you. This 'hug' tells where you belong in a man's life and the bond you share.
Instinctually, mothers tend to protectively and tenderly hold their babies same way, which are usually moments of bonding.
If he truly loves you, there'll be moments of the bonding hug to communicate how much you mean to him. Be watchful and be safe!