My boyfriend texted a friend with a female surname and said, honey, what are you doing? Miss you

According to your description, there are two situations:

1. He didn't cheat. This situation is that he and the woman are really good friends. The reason why they don't know each other for the first time is because they care about your opinion and are afraid that you will misunderstand him, but they are really helpless when you ask them.

He cheated. In this case, as you can imagine, he just cheated on me and refused to admit it.

What I want to say is that in the second case, the possibility is very small. If he really cheated and refused to admit it, why did he tell you later that he was familiar with that woman? This shows that he is really familiar with the woman, and they are really good friends, so he will tell you, just like the first situation analysis, that he didn't tell you the truth for the first time because he was afraid of your misunderstanding.

So I personally prefer the first case.

Relax, be open-minded, and learn to tolerate him, so that he will think that you are really a good girl, and then he will cherish you more and will not have any misconduct.