SS, what you're feeling is normal. There's a period of adjustment you both need to go through. Did you read the getting back after a separation book? I found it very interesting.
I would be honest and tell him you're adjusting to you two being together, and that you learned you like to do things on your own sometimes. Just make sure you make room for joint activities too.
Treasure your H. You're so blessed to have a chance to save your M! (((((((((((((()))))))))))))