What do I do

I need some help! The first 2 years of my relationship me and my boyfriend would have really good sex but this last year has been hit or miss. Lately it’s been a lot of miss idk what I should do or if I should say anything. I feel like his sex drive has went down we have sex maybe 5 times a month and that’s with me keep asking. He knew from the start I liked having sex a lot and at this point idk what I should do. Like do I say something or try and make it better without saying anything. What would you do?!