Secret He Didn't Keep

Arthur's been getting these kinds of thoughts a lot lately. It came up in one of his chats with his brother and he just patted his back and said something stupid like, "Congratulations, Artie! You've finally become a man!"

Is being unsure a necessity of becoming a man? He didn't know.

But he knew what made him think that way. The one secret he's been keeping from his woman. 

He still thinks it is the best decision to keep it a secret from her. But... He's had a nightmare yesterday. 

Nightmares that he's standing out there at the end of the aisle, the bridal march plays but she arrives covering her face...and she refuses to marry him.

"You're a liar!" she says and walks without turning back. He begs her to stop, but as a fog, she passes through. Throughout all these, he couldn't even see her face.

Will this happen if I tell her the truth now? Or will she find the truth by some other means? Will she ever trust me? Will she marry me?