OP I wouldn't want to marry someone who tells lies or is hiding things from you, especially if when you catch them they accuse you of being crazy or psychotic. It's a tactic I see a lot of people use on their SO to make them doubt themselves and deflect from them being in the wrong.

I think when you marry someone you're baring all to each other like an open book as you're commited to trying to spend the rest of your lives together out of love. I wouldn't want to and I don't think you would want to spend the rest of your life finding new skeletons in the closet. Lying is a red flag and I can only see it leading to more issues later especially if you let it slide.