Try posting here, in an involved way more often, and consciously think about how you are being received by the style and content of responses. Online writing gives you the opportunity to reflect and analyse recorded conversations you've had. This should, eventually, have a positive impact on your spoken dialogue with people. It's about learning to get a reciprocal flow going in exchanges with people, that seems to have its own momentum. Speak in such a way that it requires a response from the other person i.e. leave your spoken words open to be added to by them. Speaking in monosyllabic answers and closed sentences is very hard for the other person to keep adding to.
Also, remember it takes two to Tango, so, it's not always your fault when conversation dries up.