I'm glad you're able to recognize this. Letting go is hard, but not letting go is damaging--to you, your son, and your long-term relationship. Take comfort in the fact that Myrtle Beach isn't exactly the other end of the earth. It's not even outside the country. If he needs something, there are stores. If he needs medical treatment, there are walk-in clinics and hospitals. If lodging falls through there are lots of other options. If he gets ditched, there are planes, trains, and buses. If he's able to function at college, he can function in an American tourist town. And once you see him succeed, you'll be much less nervous when he decides to travel internationally.