Dating is different when you get older. You're not as trusting, or as eager to get back out there and expose yourself to someone.
An undeniably awesome couple with amazing chemistry. Let's make the world jealous!
People could rationally decide that prolonged relationships take up too much time and effort and that they'd much rather do other kinds of things. But most people are afraid of rejection.
TylerG has not specified any interests yet. Why not get in touch with them to find out what interests they have?