Cant stay wet

I’ve been fw this guy, we both really like eachother but the sex is just not it. Mainly on my part, he doesn’t do anything wrong and it’s not weak dick lol but I get wet for like 30 seconds then boom dry as fuck again. This has only happened to me once before but everytime me n him try to have sex my shit just don’t get wet, and I always gotta finish him off with head. I’ve already told him we should use lube but idk I don’t think he really feelin that and idk why I can’t stay wet. Foreplay is there and I do like him n I’m attracted to him I just don’t know what it is. I know some girls are just naturally like that but I’m definitely embarrassed and worry about it because I know sex is a huge part in whether a relationship comes out of this. I just need help 😭