Help! Please!

My boyfriend and I have been together for almost 10 months now. I love him a ton in every way except I'm completely unsatisfied in the bedroom. He used to try and I would turn him down a lot, so now he's given up.

I'm too shy to tell him about what I like (kink) and when I'm in the mood.

(He's extremely vanilla)

When we do have sex it's just okay, he always finishes in about 5 minutes and that's that. He also isn't exactly large in that aspect and I crave my ex boyfriend. I know I'm horrible but he knew what I wanted sexually.