I think just time passing and realising there’s nothing that you can do to change things. I have regrets such as proposing to my now wife after she had gone, wish I had done that when she was alive. She would’ve loved to see me get married and obviously will never have a grandchild. I always think about the positives and that she had a great life, I try to remember that whilst it is shit for me there is plenty of people who have had it way worse than me.