Hi Birdie and welcome.
I am new here but a lifelong CD.
I will say that I hid it from my SO for almost 1.5 years. I told her because I want to marry her, and I don’t want any secrets amongst us. I was deadly fearful of losing her by telling her or if by telling her she would view me in a different light. Fear is a strong human emotion. Anyways, I wish you and your SO the best for your marriage now and going forward.