One of the few things I've learned in this life is that first and foremost you have to be true to yourself. If you can't be true to yourself then you can't be true to anyone else.
Taking the long slow haul instead of the fast route out doesn't mean for one minute that one is being untrue to oneself. I'd rather do it the slow way and keep my relationships intact (especially at my age) than to find myself totally alone. It must be great for those that have no consequences to suffer by doing it the quick way. There are many that have done it the quick way and are suffering a lot of emotional pain as a result. Everyone has to do what is best for them, be it quick or slow. No-one else can say what is the right way to go for another person.