I hate myself

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I've been dating my boyfriend for a month now, last week I met his bestfriend and cousin and the other day I met his whole family just about, and now tomorrow my partner wants me to go on a double date with his bestfriend and cousin again. I was scared shitless of meeting them and I still am nervous, I don't want to be around them, I know that sounds bad but I'm so anxious and i keep bailing on our plans what should I do?