You ask me about regret? Let me tell you a few things about regret, my darling. There is no end to it. You cannot find the beginning of the chain that brought us from there to here. Should you regret the whole chain, and the air in between, or each link separately, as if you could uncouple them? Do you regret the beginning which ended so badly, or just the ending itself?
You have to take the good with the bad, smile with the sad, love what you've got and remember what you had, always forgive and never forget, learn from your mistakes but never regret people change and things go wrong but just remember – life goes on!