When I hit about the age of 47, my "sexual self exploded", too. I'm now 53 and as "highly-charged" as ever. Unfortunately, I'm not currently in an intimate relationship w/anyone... nor have I been in years. But, if I were... I'd keep telling him about my desires, I'd be asking him about his... keep whispering about the things we could do... I could do... he could do. I'd spice up my daily interactions with him—tell him know hot I am for him.
Oh crap... went off a bit, there... sorry.
Like Mike_J says, nonjudgmental open communication is key. Don't hold back.