Imo, it is not something you tell a girl you haven't known that long. I wouldn't tell a girl unless i were thinking about getting engaged. If you are not engaged, thinking about it, you in my mind are still single and able to do what you want with your life. Not to bring religion into this but iam Catholic, not a real church goer, but was brought up with it. Anyways, to make a long story short, i went to confession one day and confessed my sins and told the priest an indescrection i had with my then wife. His words were, and iam quoting a priest "My son there are some things you just do not need to say." There are just some things you do not need to confide in even if you want to be totally open. Sure if you are planning on marrying this woman, and you can not hide this, as you are doing it all the time and having stuff in the home, but you are not, and from what i read, you haven't even been seeing this girl for very long. This to me was a big mistake on your part. Live and learn bro. Maybe you need to have a heart to heart talk with her and tell her that if you did not feel deeply about her you wouldn't have told her. She should realize that for you to have told her this, that you were really opening up to her. Imo, if she leaves you for this, then she isn't the girl for you.
