Sort:  

At times I think that what I have to say is not good/interesting enough. When I interact with people it makes me tired quickly. Sometimes I get really nervous than I have to speak on the phone. Most of the time I don't want to meet with anyone or go somewhere. In the past I enjoyed going to watch basketball games but now I no longer do that.

Maybe you need to get out more or, find places where you can interact with people who are interested in similar things, that way it is easier to talk without having to immediately focus on anything personal.