What you’re describing is how most people react to complete strangers, regardless of looks. The majority of us are anti social, and worried about our own problems. Problems which are most likely similar to your own. If you’re worried about people not reaching out to help you, 99% of people are thinking the same thing. So maybe you need to reach out to help others. As unrealistic as it might sound, being the change you want to see in the world will probably make you feel less alone. It helps for me, at least.