I would guess that your boyfriend feels the same, so although you say you don't want to talk about it, I think you need to for the sake of the relationship.
From another Q&A website..........
Do you really have no imagination? Is your boyfriend truly too unwilling or shy to give ideas? Maybe you need the confidence to express yourselves freely and experiment with your sexuality without feeling embarrassed. So forget about doing any physical experimentation for the time being, and instead see if you can find more ways to talk about and explore each other's thoughts and fantasies.
You can get the discussion going in a number of ways. For example, you can choose and watch some adult sexuality education videos together or rent some erotic movies. Talk about what you see in the movies, and how you feel. What turns each of you on and off? What is appealing to you in fantasy, but might be unappealing to you in real life? Or, how about some books to spur your imaginations? Zillions of how-to books are available that offer ideas for spicing up one's sex life. There are also some beautiful sensual books you might want to look at, such as The Pillow Book. Read them together or read them aloud to each other and see what is inspiring, appealing, or exciting to each of you.
No one needs to feel pressured into doing anything. The discussion is what's important, as well as learning about one another and finding comfortable possibilities to think about and explore.