I think my BF is thinking of cheating on me.

I just got off the phone with him, and he says hes coming home straight away after work. I didnt tell him that I was using his laptop to check my emails and when I turned it on, Skype automatically launched upon startup. I found out he had been chatting with this woman, and theyre planning on meeting each other by attending some event called dream tours for singles. At first, I was in disbelief and was really angry, but now I just feel deeply hurt.

Im planning on confronting him about it when he gets here, but idk how to approach the subject. From what I gathered, theyve only been chatting for about a month now and have been exchanging selfies, but thats it. I think about how hes planning on cheating on me during the event and it just makes my chest hurt. Should I give him another chance? After all, he didnt technically cheat on me yet. Please give me some advice! Im so confused.