Jose.
It's time to grow up and be a man. Getting old? My ass! Scariest birthday? Limited lifespan? Boohoo, shit happens. Cry me a river.
But you not having immortality? You kidding me? It's time to take things into your hands and find the fountain of youth. Yes, it's going to be hard and expensive. Doesn't matter, you have to be a man and find the fucking fountain. You'll have to make huge sacrifices, but immortality comes first. You'll have to take on shitty jungle treks, research Mayan culture, but at least you will be with us forever. If you don't do something, you might as well say goodbye to your girlfriend 30-40 years from now, (which is the life expectancy of someone who takes care of themselves).
Apply for visas to every country that may have the fountain of youth. Don't be picky. Go to every embassy. Talk to everyone, including Harrison Ford and Lara Croft. Check every possibly route. With this turning 60 shit you actually have a great cause for the coveted fountain. Go anywhere that is closer to your goal. Live there for as long as it takes for you to get information, then stay or move on. Worst comes, pack your bags, take a plane and request directions once you land. You are a smart guy, known the Indiana Jones movies better than most of us, speak the old tongue, etc. so you already have an advantage.
No more talk of depression. You have your goal, now go and make it happen. Fuck prays and hope. You can do it.