Can’t get wet

My boyfriend asked if we could have sexy time and I said yes, and started sucking his dick. He told me to get on but I couldn’t because I wasn’t wet at all. I felt bad because I wasn’t wet and i can’t just get wet from sucking him. He got me a bit wet ready to get on, so I did.

We were fucking for about 5 minutes and he asked if I needed lube and I got emotional and started crying. I don’t know why I was so upset I guess I just feel bad that I’m not into it. He said sorry that he can’t make me wet, but I feel bad that he feels that way. I love him so much and he can get me wet he just didn’t tonight. (I’m on my period too so idk that could have something to do with emotions)

Him and his ex girlfriend had a massive sex life and we’ve been together for a year but i still feel bad whenever I can’t get wet because I feel like it ruins sex for him.

Any tips PLEASE?