I have many regrets over stupid decisions that I have made in my life time. I have wronged some people and often I wish that I could turn back time but the past is something we can never get back.
I look back on my life and often wish I had done things differently, especially when it comes to people I inadvertantly or foolishly hurt. One in particular, a former g/f, I would dearly love the opportunity to apologise to for sometimes being a complete dickhead while we were together. I don't know that I'll ever get that chance, and I certainly can't turn back time to edit out those foolish and hurtful things, which is why I try to use my experience of life to do so much better and avoid hurting others.
Maybe I'm a better person today for having made mistakes and learnt from them, but it still doesn't stop me from wishing I could take them all back, so you're not alone in your thinking, JC, and the passing of all these musicians of late has made me realise that we're only on this Earth for the blink of an eye and time is too short not to love thy neighbour, friends and family.