How do i get over what my husband did?

A couple of months ago I came across a message on facebook that my husband sent a friend in mexico. I undertsand a lot of spanish though I can't fluently speak it. There was a word that I wasn't sure about that he said meant dirty/nasty as in playing around. I did not believe him. But I let it go. I just recently found out what the word meant and it means "hottie". So now I'm mad that he lied about it. And I found another message to another friend in mexico saying what are you doing MY (and then the girls name). He doesn't see anything wrong with talking to friends like that. I consider it a form of cheating. If it was vice versa he would flip out. I'm not talking about ending mymarriage over this. If he had physically cheated there would be no question. My thing is he doesn't talk to me like that. I practically have to beg to get any sorta compliment from him unless it has to do with sex. We have never had any problems in our marriage even this seems so small but I still am upset about it. We've been together 5 years and have a 4 year old. He's not very romantic and he doesn't show his feelings often. So for him not to say stuff like that to me do I have a right to be upset? I don't know how to get passed it and him lying about what the word meant. (When I told him I found out what it meant he admitted it) can someone help please