HELP!

I have been talking to this guy since November, we have done a lot of things between spending quality time to sex (all 3 holes and all different positions. So obviously past the embarrassing moments haha). He told me at first he was interested in a relationship, then things happened that I had to be there as just a friend for and one night (I spend the night every weekend with him) he told me he wants me to step up and show him I want to be with him and take charge sometimes. I have never been that type verbally besides with my ex of 5 years. I want to be like that with him but I can't get myself too no matter how much I want to! I want to tell him to bend me over and do things and make first moves. I need tips please on how to get rid of this stupid wall I have up that I don't want. I have tons of lingerie, boots, etc. but can't get myself to do things I should do.