You need to sit down and have a serious conversation about it.
Are you both quite young? I had a boyfriend many moons ago who wanted it 3 or 4 times a day. At first it was amazing.... a few weeks after he moved in, I asked him to move out as he was literally sex obsessed, waking me multiple times during the night! My point is though, younger men, usually under 35, can be like this.
If your sex drives are mismatched, could he sometimes deal with it by masturbation instead? If the rest of your relationship is really good.... and I'm assuming so, otherwise you wouldn't be looking at settling down with him, then I would try counselling first?
Nobody wants to feel pressured to have sex. I'm a woman and I would happily have sex twice a day. But everyone is different. I recently left a sexless relationship as I discovered my ex was a porn addict and could only get an erection for specific images. It was incredibly disheartening and frustrating wanting someone, but being unable to connect at that level with them. The lack of communication and lies killed it in the end, other levels of disrespect were there too.... I digress.... my point is, communicate kindly, gently and clearly. Make sure he knows how much you care for and value him though.
I hope you get sorted OP.