Help, we are having a bbq at my house and I have social anxiety! What do I do :(?

I am super scared, i guess my problems socially are getting worse and i haven't gone to or had a party in years. I am really getting scared about everything and the last thing i want is to make a scene and have a panic attack when people are in my house. I would ask my best friend to come and comfort me but my best friend is going on a family trip today. Can someone please please give me so advice or just help out?
Help, we are having a bbq at my house and I have social anxiety! What do I do :(?
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