how to be less awkward around bf's fam??

Zoey💞🌻
So my boyfriend and I have been dating for a little over two years. His family is super nice and mostly all seem to like me.. but for some reason I feel SO uncomfortable around them. I really care about what they think of me and it's hard for me to be myself...
 this weekend there's a family party where there is going to be a ton of family that have heard about me but haven't met me yet and I'm SO nervous. Not to mention my bf has a habit of walking off and not introducing me to people. He doesn't mean to be rude he just doesn't think about stuff like that... 
my question is how can I be less awkward and not sit around on my phone so that they like me??? And are any of you still uncomfortable around your S/O's family??