He won’t have sex

So my fiancé has been acting a little distant, honestly I have a very very high sex drive I’m young of course I do. Anyways it’s almost awkward because I have to ask to have sex, I can never come on to him he gets weird and I have to stop. When he wants to we will, honestly it’s aggravating I’ve asked for two days and he replied with oh you’ll get it, and I just sigh because I know I won’t, honestly lately it’s been quickys so and he just finishes. I have no idea what to do talking doesn’t work i swear, any advice