SC Along with detaching, try not to be so available to him. I understand why you`re going out with H. Go and have a wonderful time and look and feel your best.
Back in reality, be a little mysterious. Don`t always answer his calls, let him leave a message, when you do speak on the phone, be sure to end the conversation first. Buy yourself a small bouquet of flowers, just because your beautiful, and let H wonder about them. You have nothing to hide.
Just a few suggestions that worked for me. This is a long, long, ride.