Hm, yeah, I can see why that can be a bit scary — I don't mean for you, but for the person making overtures of friendship. It could be that you're just being too full-on too fast, and so potentials never get to develop into actuals because you've scared them off.

(Again, this is all speculation because I barely know you and have never seen you IRL; please feel free to tell me if I'm talking rubbish and not being helpful.)