Find better speech therapy. Effective speech therapy can be quite miraculous. It's not easy to find qualified speech therapy for stuttering. And you have to be willing to do the work. When I got fluent, it wasn't techniques or strategies. It was learning to speak fluently. Very much like learning another language. My disfluent speech and fluent speech were completely separate. I mention this because you're looking at learning ASL, which would be separate from your disfluent speech. 10 years is ridiculous. Those friends you have today will go their own way. You want to be able to grow your circles. To branch out and grow in life.