I found out my girlfriend of 3 years had a “Matt from gym”

I honestly dont even know if i should post this here but i cant really tell anyone i know about it.

So me and my girlfriend were together for almost 3 years and lived together for about a year and a half. Things were pretty normal. work, netflix, cooking sometimes, arguing about stupid stuff like dishes. nothing that made me think something was wrong.

About two months ago she started acting a little different. nothing super dramatic, just small things. She suddenly kept her phone with her all the time. Like even when she went to the bathroom. Before that she used to leave it on the table or couch all the time.

Then she started working “late”. at first it didnt seem weird because her job can be busy, but it started happening like 3 or 4 times a week. she would come home tired and go straight to the shower.

One night she fell asleep on the couch while we were watching something. Her phone was on the table and it kept lighting up. i wasnt planning to check it but i saw a name i didnt recognize. It said “Matt from gym”.

The message preview said “miss you already”.

I just stared at the phone for a few minutes feeling kinda sick. eventually i opened the messages. yeah i know thats probably wrong but i needed to know.

Turns out they had been talking for weeks. flirting, talking about meeting after her “late shifts”, sending photos. nothing crazy in the chat but it was obvious what was going on.

What hurt the most was seeing messages where she complained about me. She said i was “nice but boring”.

Two days later i asked her who matt was. she froze for a second and then said “just a guy from the gym”.

I told her i saw the messages.

She didnt even try to deny it. she just said she didnt know how to tell me.

Apparently they had been seeing each other for about a month.

So yeah. thats how a 3 year relationship ended.
Still feels unreal tbh.