I Lied About My Age

Okay, so this is stupid, but it's been eating me up. When I met Mark online, I shaved a few years off my age. Like, five years. I was 38, but I said I was 33. I know, I know, it's pathetic. I was just so scared he wouldn't be interested in someone my age. We met up, and things clicked. Now, six months later, I'm terrified of telling him the truth. What if he thinks I'm a total liar? What if he dumps me? It feels like a stupid lie, but it's a big one, and I don't know how to fix it. I feel so guilty.