can't ever cum...

I've been with my man for almost 6 yrs now. I've lied and told him that I came during sex and it's so not true 😩 he'd be devestated if he knew. I have come close but it just takes me FOREVER and it's only when I choose to stimulate my clit while he's on top. First of all, should I tell him I've been lying? Or can someone help me find a way to just freaking do it!? Lol