Help. He challenged me.

Okay to some people this might be odd but I have been with my boyfriend for more than 6 years. Sex have gotten a bit boring. We don't live together and we don't meet often either because we're so busy with college and work. Anyways the challenge is that he wants me to work hard and seduce him. Basically want things to spice up in bed. I am a shy person. We've had sex many times but I'm still shy. That's just in me. He said he won't give in easily.. And will make things hard for me but he REALLY wants me to succeed of course. Please don't judge our relationship. We really love each other and are faithful to each other. Just need some tips on what i could do.. Thanks ❤️️