AITK for walking away from my relationship after my boyfriend shared a flirty conversation with a colleague?

I (27F) have been in a long-distance relationship with my boyfriend (27M) for six months. This past Friday, I had a job interview that didn’t go well, and I felt pretty down. To take my mind off it, I went to hang out with my guy best friend, which I told my boyfriend about. He’s never expressed any discomfort with my best friend, and I’ve always been open with him, saying, “If you ever feel uncomfortable, let’s talk about it.” There’s nothing romantic between me and my best friend.

My boyfriend, however, has a colleague at work who has been openly hitting on him. Recently, she asked him out for dinner and drinks, and he agreed. When he told me about it, I admitted that I felt uncomfortable but didn’t want to make a big deal out of it. I told him to go if he wanted, and I trusted him.

That night, after the dinner, he texted me at 1 AM saying he was home. I replied, “Cool,” and didn’t ask for details because I wasn’t really in the mood to hear about it. But then he sent me a screenshot of their conversation, where she was flirting with him, and he was clearly flirting back.

Seeing that hurt. I replied, “I really don’t want to know,” because it stung to see they had a good time, and I didn’t want to dwell on it. I also asked, “Why are you sending me this, especially knowing I’m uncomfortable with her? And why are you flirting with her?” He said the screenshot was to show me a “weird question” she had asked him, but that felt like a weak explanation.

I told him, “I know you have options to date other people, but you don’t have to flaunt it by sharing this with me.” He didn’t reply right away because it was late for him, and we’re in different time zones. Before going to bed, I texted him again, saying I wanted to discuss it over a call the next day.

When the next day came, he didn’t respond or call. By midday his time (midnight for me), I texted him again:

“Since you’ve decided not to have this conversation, I’m going to let you know how I feel. That screenshot was hurtful. I was already uncomfortable with you going out with her, and seeing you flirt with her crossed a boundary for me. I respect that it’s your life and your choices, but I also have my boundaries. I’m going to respectfully walk away from this. Good luck.”

I went to bed hoping he’d respond, but now it’s been a full day, and there’s still nothing. It’s breaking my heart. Part of me feels like he’s doing this to get back at me for spending time with my best friend or because of my comment about him having options.

So, AITK here? Should I walk away for good, or am I overreacting?

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