YetAnotherBob also made some suggestions in a post right near the top of this thread. May I mention that I was emotionally scarred from an abusive childhood and the Dale Carnegie Human Relations Course changed my life completely for the better.
To be honest I attended the Dale at my own expense resulting from taking the Success Motivation Institute course, again at own expense. One of my goals was to have 100 friends. Where I was at the time, if I'd asked 100 people I knew to a party, maybe 10 would have pitched up!
Yet another suggestion is Verbal Judo. In the USA you can attend live courses. I read the book and made two of the techniques part of my everyday pattern.
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