I want to have sex but I loose interest. what should I do?

Hi all.I am a newly married girl. I got engaged with my Boy Friend. I love him a lot and he loves me. But the problem starts when we start making love. We do foreplay for 5-10 minutes then I get aroused. I get wet. But it(Wetness of vagina) stands for only 5 minutes for me. Soon my vagina becomes dry. I loose interest. It is not because I do not want it. But my vagina becomes dry. My hubby does foreplay again to make me aroused but it just doesn't happen. I really want to have sex with complete orgasm but nothing seems to be happen. What should I do?