My (22M) girlfriend (22F) of 2 years has started a “loose relationship” with a guy she used to date.

Hello. My girlfriend and I have been together for two years. Around 7 months ago, she told me she had been in contact with a guy she used to date (let’s call him Dave) again. He was her first boyfriend I believe and I wasn’t too comfortable with the idea of them staying in contact, but I understood they had a history together and she wanted to be friends. <br><br>This went on for a few months, her informing me that they had been communicating, and I never really saw anything to suggest that anything was amiss. That was until I found a voicenote she sent him (I’d never looked at her phone before) where she was telling him that she was showing him her new lingerie. This was back in August. She confessed she had been taking naked pictures of herself and sending them to him, and he had been doing the same. At the time, she told me they were just “friends” and that there was no intention for them to get together, but they would send pictures to each other. I was absolutely gutted. I told her that I wanted her to stop doing it, but she told me that she didn’t see anything wrong with it. After a big argument over it, she told me she didn’t send pictures anymore anyway, and that they were just friends again, and that the pictures exchanged were months ago anyway. I was heartbroken, but I didn’t want to see the relationship end. So I stupidly agreed to let it go. <br><br>However, I’ve just found out that over the past 2 months, they have been meeting up together secretively, whenever I was out (I work nights so I’m often out the house at night too and that’s when she would meet up with him), having sex. I confronted her on it tonight, and she admitted it had been happening for 2 months. She tried to justify it by saying I was too big a prude for her, and that I wouldn’t do certain sexual acts that she likes in the bedroom, and that Dave was willing to indulge her in those things. I asked her if they were still in love with each other, and she admitted they were, and that she had always loved him. <br><br>I’m utterly heartbroken. I feel like I’ve been blind sided. She wants to remain together, but I just don’t see that as feasible anymore. How do people do this? How can someone be with you for 2 years, use you, then just make it apparent they love someone else but still expect you to be with them? I’m not someone who will often stand up for myself, so it’s really horrible. Any advice?<br><br>TLDR; My girlfriend who I’ve been with for 2 years started sending pictures of herself to her ex, and then started secretly meeting up with him and having sex with him, while still expecting to be in a relationship with me.