So you’ve been with this guy for a long time now but he has never met your friends or family and he never even tried to introduce you to the people close to him.
Whenever you tried to introduce him to the people who matter to you, he had some kind of excuse.
Even when the two of you run into someone he knows, he always introduces you as nothing more than his friend.
If this is the case with your almost relationship, it should be more than clear that it is not likely for it to turn into a real relationship.