You seem overly focused on your step-daughter. You've said many times that you are lonely and use your step-daughter as a companion because you don't have other adults to talk to. Now you're concerned that she isn't socializing enough. Maybe just focus on yourself and finding your own friends. Focus less on her and more on improving your own life. She can take of herself. Your anxiety and fixation on her doesn't seem to healthy for either of you. I'm sure she can navigate her own life.