Is 17 years age difference too much?

Recently a younger man (33) contacted me (50) on one of the apps. We chatted a bit and decided to meet. What can I say? He's gorgeous. Intelligent, warm, funny, open, decent and handsome. We've been seeing each other every day since and he's very much into me and starting to fall in love. Surprising for me because lately I've been starting to feel somewhat invisible. I like him a lot too. And I mean A LOT. A part of me wants to be around him for the rest of my life because it feels like he's the man I've been waiting for. But I'm hesitant to go deeper due to the age difference. 17 years is a big gap. He'll be my age when I retire and I might be dead by the time he does. What are your thoughts on this?