please help me

You guys I do not know what to do. I am having problems with dryness and my boyfriend is insisting it's his fault that he's not big enough or he's doing something wrong. I hate that it frustrates him, when he hears stories from his friends of their success with making a girl come. I'm so attracted to him like I just wanna jump his bones when I see him but I'm only wet enough for like one round. He has only made me come like twice at most and we've been dating for six months. We've recently started using lube which has helped but it makes me feel like there's something wrong with me. This whole situation does.