Not negative, just suggesting caution.
I read way more than I post here. If someone has said it I usually don't post if I have nothing valuable to add. Of all the posts I have read here, a SO reacts worse to the deception than to the dressing. If they had a chance to make a choice early in the relationship they don't feel like you "trapped them" into acceptance. If you wait many years later and spring it on them, they feel they were given no choice and are very resentful of being lied to. Regardless of how ashamed we felt, or scared we were to share this secret part of ourselves that is so misunderstood by society, our SO has every right to be angry that we lied. I will say you have a lot going for you already. Many SO take an absolute disgusted position because that is what they feel inside. Your SO is actually letting you do it without throwing a fit or threatening you. Big Plus. you may ease into it on one of these dressed heart to heart talks. You may tell her you have always been attracted to the idea of dressing since young (if this is true for you) and come clean and tell her you really are a lot happier being able to express both sides of your personality. I came out to my SO and have never been happier. I felt the same as others here, like a weight had been lifted off my shoulders. We now go shopping together for dresses or skirts, makeup, jewelry, etc. We even had a manicure and pedicure together. My point is you finally took a very courageous move in doing what you have done, I just don't want to see it end bad when it could be a lifelong bliss of what you are currently experiencing. Read on this sight, and learn from the successes and failures of others. Regardless of how negative some of the girls here may sound, they are really just trying to help. I wish you and your SO years of happiness on this continued journey.