She slept with someone else while we were dating
I have been seeing my girlfriend for about 10 months. At the start I took her out on two dates and then for a week or so she stopped texting me, then came back out of the blue. We went out on a third date and then progressed through to our current relationship. I just found out that after she met me she went out on a girls night out and met someone else. She went on several dates with him and ended up sleeping with him. She states this was a mistake, that she wishes it hadn't happened. Our relationship was fine up until this discovery but this has upset me and caused me to think about whether we should continue even though I love her.