I feel you on that. Having a friend who you're comfortable with will help. Someone else who's also awkward would be a good person to take along so that you guys have each other and can vibe together. Other than that you can simply enjoy just being there and float around and make conversation with as many people you can. Just get around and be friendly and open with everyone. Be comfortable with being alone too. I have a friend who's super popular and always invited me to parties full of people who I'm not familiar with. She knows I hate these kind of settings but still invites me because she wants me there. What I learned was that you just need to get over your social anxiety and get in on the fun. Doesnt mean go embarrass yourself. Involve yourself with other people and engage in conversation. People will be open if you're open. Sometimes you can just observe and still have fun. Sometimes people will even approach you.