Sorry, this is my first time posting so I might write messily. Sneaking away from my boss to post this at like 2am because I’m so stressed I don’t know what to do.

I’m 38. I work at a shop in a mall in Nonthaburi, near the kitchenware section. When I have downtime I write product lists with my own blue pen a lot. I’ve been with my boyfriend for 4 years — sometimes we live together, sometimes apart, since we both work. We don’t see each other much, but I never thought I’d get to this point.

Two nights ago (around 2:30am) my phone was low so I borrowed his phone for like 2–3 minutes just to check food options before ordering. I accidentally scrolled into a chat saved under a nickname I didn’t recognize, and the other person wrote, “I miss you today so much.” I was shocked and couldn’t even type. Then my boyfriend replied, “Wait until I’m off work then let’s meet, love you.” My heart just stopped for a second.

Like… I was stunned. Totally dizzy. I felt cold all over. So confused.

I don’t want to jump to conclusions fast, but I feel betrayed — or maybe I’m overthinking, I don’t know. I’m scared to confront him directly because he’d know I snooped his phone. Is that stupid? Like should I just ask casually, “Who’s that?” And if he lies, then what do I do? Should I wait for him to bring it up himself, or should I check more messages before deciding?

I really want to cry T_T but I don’t want to act rash and make things worse. I want a way to talk without making the situation explode. Has anyone been through this? Please give me advice on how to start the conversation or whether I should just let it go 5555 — seriously.