That's so hard. I'm so sorry.
When I was 17, I was really attached to a social worker who left to have a baby. The agency would only see me until I was 18 so I just left. When I called back a long time later, they told me the social worker I asked for had left, and wouldn't tell me where she went so that I could contact her. It broke my heart, and I swore up and down I'd never get attached or go to therapy again. Then when I was a few months away from being 21, I took the dive and entered therapy again. I was lucky, my T is so awesome.