I (29M) was in a long distance relationship (26F) that was non-exclusive. We had great physical and emotional chemistry and fell in love fairly quickly. Since we were VERY far apart and both had healthy sex drives, we mutually decided to date/hook-up with other people until we were living in the same city, and then we would re-evaluate. There was a sense that even after we were living in a new city, we might continue to be open because we’d both previously been in relationships where our sex lives stagnated.

While we were living apart, a different girl and I hooked up after at a party. She told me she didn’t have any sort of STDs. I had been tested recently and hadn’t had unprotected sex since I had been tested. She was on birth control so we had sex without a condom.

Unfortunately it turns out she did have, and thus I contracted, an STD (chlymidiya). I got tested as part of a routine physical and it came back positive. I immediately went on anti-biotics for a week and then got re-tested and was clear of all STDs. 

Fast forward a couple months and my girlfriend and I meet up and continued having sex. We always wear protection, and at this point, I’m completely clear of having any STDs. I never mention anything about the recent STD to her mostly because it’s embarrassing and because I took the necessary steps to make sure she wasn’t at risk.

She later was helping me pack and found some papers in my bag related to the test. When she asked me about it, I came clean and told her I got one, but that I made sure to take care of it ASAP, and that I’ve been clean every time I’ve slept with her. 

She was very, very upset and said she never wanted to see me again. A couple days later she said she would try to move past it because we love each other so much. When we tried getting back together, it was clear that there was too little trust between us for the relationship to work so we ended things.

While I deceived her through omission, on a scale of 1-10, how big of an asshole am I? Also, on a scale of 1-10, how upset is she justified in being?