With an age gap of that size, the biggest factor is that he is going to be ready to settle down and take a career or profession to the max if he is in fact a motivated individual with goals and on track with his life, whereas you are at the age of choosing whether you want to go to college or not, deciding what career direction you would like to pursue if any, and starting your life on your own. Given the situations, if your lives are in fact as active as most people's lives at your ages, then you won't be seeing much of each other other than later during the days or during mornings. Other than that, it is easy to grow dependant on him given that he presumably has a home of his own and has been able to fill it with about 10 or so years of working and personalization. And if you grow dependant on him, and then the relationship happens to not work out, that leaves you back where you started before you met him, if you can in fact get back there provided you are still in the same general area geologically should such an event happen. Geologically because familiarities such as family and locally known businesses and friends would be a contributing factor to your recuperation. There is a lot to factor in with such an age gap. However, I by no means seek to simply discourage you from it. There have been successful relationships with such age gaps that turn out just fine. While I've seen 'follow your mind' posted previously here, I can full heartedly disagree with that statement, as the mind knows nothing but what you teach it, whereas the heart only knows the truth. Following your heart is the only way to approach this, and if you feel any sort of dissonance with it, then don't be afraid to back out. However if pursuing things such as dating this man come into resonance with you, then by all means follow your heart and see where this takes you :)