My new roommates might already hate me because of my avoidance

Less than a week ago I moved to an apartment with other two people. Problem is, they aren’t here yet and are coming back in February. My landlord left me their numbers and told me to call them to get to know them. I haven’t because I fucking suck at any kind of social interaction with strangers, I cannot send a single text without thinking about it for entire days. I literally don’t want to be perceived. My landlord said they’re now disappointed I didn’t text or call them because they think I’m rude and don’t care, but I am literally terrified of talking to any person I don’t know. Even a “Hey what’s up, I’m your new roommate”.

This is the second time it’s happened to me and I am so fucking miserable. I am so ashamed of being like this, I’m sorry my avoidance is a problem to everyone else. I’m so tired of being a social freak.