The fact that he is tracking your activity on online forums, claiming to know where you live, and saying he is staking you is REALLY scary. The fact that he chooses prostitutes over relationships with real women is concerning if you are hoping to have a real relationship with him. If he has spent almost 40 years being afraid of relationships, why would that change now? It probably won't. I would be really, really careful about proceeding to interact IRL with this man. From your other threads, this guy sounds like he could be dangerous. If the information you have shared previously is all true, he has the majority of the risk factors that we look for when we assess someone's threat as a stalker (I published a book on the subject). I would be extremely hesitant to meet this man in person.