Super dry

Me and my boyfriend aren’t living together and live 3 hours away.. whenever we have sex it’s always hard for me to get wet. I have told him before we should use lube but he’s against that. This past weekend we met at his parents house and we were having sex, I haven’t seen him in over a month so I was more than ready, I was horny and wet right away but then I instantly got dry. My boyfriend got mad because it was hard to have sex when I’m dry. I said I was sorry and I do love him. He told me he just doesn’t understand because I should be wet if I’m excited to see him and horny. We do mess around before we have sex and I do give him head.. however I’m very picky and always make him wear a condom.. I don’t know what to do to increase my wetness if he’s against using lube