Definitely time to pick up those activities again. Try your local U3A .... there will be lots going on. Join now before DD lives and get stuck in ready for when she goes.
Think of it as one more new phase of life to be mined for it's possibilities.
Grab the positives .... your DD is fit and well, she is moving on to a new life, she is not far away, you will see her lots, you are young enough to find new activities ... I know it feels hard, but sometimes things feel worse in prospect than they do when the time comes. Good luck.