<human>: Can you give me a shortened version of the text?

So backstory. We're both 22. I have been dating this girl for about 15 months now. She's honestly the first girl I've ever had this type of serious relationship with. I had been looking for a girlfriend before we started dating and had made an OKCupid profile. I never told her about it.

I knew this girl in real life and started dating her. When I started, I kinda considered it a shorter-term thing. I wasn't truly invested in the relationship and I often found myself thinking that this was more of a 'trial run' until someone better comes along. So I kept the OKCupid profile and would keep messaging people on it. I got a few replies and had some conversations with people on the site, but never cheated on my girlfriend, as I found myself growing more and more in love with her.

We would sometimes have fights and she'd threaten to break it off and I'd go back to OKCupid to make myself feel better about things and bolster my ego. This weekend, both of us had an amazing weekend together until she found out about this, went onto my OKCupid profile and saw that I had been messaging girls. She freaked out and told me that we're over.

Problem is, I love this girl, Reddit. I know what I did was dumb, but she grew on me and now I don't know what to do.
<bot>: GF found that I had still been messaging girls on my OKCupid account even while we were dating. What do?