Are they willing to meet you halfway?
Will they take precautions if it makes you comfortable? If they want to get a group together indoors, and you ask if it can be outdoors, will they concede? Or does it have to be their way or no way? Regardless of a pandemic, you want friends who are willing to compromise, especially if it means easing you of anxieties. Making you feel safe should never be an inconvenience to someone who really cares about you.