Hmm, "what use do I have for them." That right there is a comment that worries me.

Previous posters are correct, validation comes from within, but I wonder if your attempt to communicate and interact are as clumsy as your post was. Sorry, I don't mean that to sound harsh. But when you talk about 'using' another human being I wonder about your boundries and interactions.
justafriend306 had some good suggestions and pointers I might start there. All the best, I hope you find a way to work this out.