Struggling with Social Anxiety in My Boyfriend's Family

My boyfriends family doesn't like me because I'm too quiet. I've always struggled with anxiety, so I'm naturally quiet as I'm scared to say the wrong things. Plus my family in general are quiet and keep to themselves. so I've grown used to it, and that's just how I was raised. Plus with my trauma, It's even worse. His family is definitely more outgoing and talkative. They're all social butterflies. I feel bad. I've always hated how awkward I am. It ruins everything. Having zero friends, relationships with anyone. I wanna fix it, but I don't know how. I'm on Celexa currently, but they didn't seem to do much anyways. I don't want to rely on medicine to "fix" me. Any suggestions as to what I can do?