Sex advice

So my boyfriend and i have been together over a year i explained to him before we ever slept together that I'm not an easy lay as in i take a while to get wet and warmed up enough to get off... He has a problem with the fact that he says I'm the tightest and most amazing sex he's ever had but also his end goal is my orgasm but here lately he's not been able to get me over the edge what can we do i dont know how elsr to explain other than more foreplay but i dont want to be judgey or mean i want to help us both and have the passion and awesome sex we had before any advice