Trouble getting wet

I’ve noticed I don’t get very wet when I’m in the mood or even when my boyfriend is turning me on by kissing me and touching my body. It’s not that I don’t want to have sex because I REALLY do anytime, anywhere. I’m his first so I don’t think he realizes it’s not normal for me to not get as wet as I should so we either use spit or lube.. is something wrong with me? I really want to be able to please him more without anything extra needed. What do I do?