Your friend is probably right about needing some time to yourself. And your H might also. Your reunion will be intense, so you'll both need some recharge time.
Try to remember that you have no control over H and his actions/reactions. You just control you. Things could shake out in so many different ways for your sitch, so just keep reminding yourself that you can always depend on yourself and you'll always be OK.
Enough on the cautions for now. Go have a great time in the Bahamas! How exciting!