Hi Teresa, in a strange way I understand this. My boyfriend is 20 years older than I am, and while I love and adore him and can envision our future life together, I am petrified by the thought of losing him in the future because of health issues. I am so sorry you’re going through this! I will keep you in my prayers.
What I’m trying to remember–and maybe it will help you, too–is that life is so unpredictable. I can’t control when he or I will die, as we all will eventually. But I can work on making myself more focused in the now. Enjoying the relationship now, learning from it now, and instead of anticipating the worst, embracing the best now. I am sorry the younger guy didn’t see it that way, and I hope you are blessed to find someone who does! (And I hope you and I can both learn to embrace the positive in the present, too.)