Question for married Army men?

My husband is in BCT right now. When he was home on Christmas, he kept talking about a female in his batallion. I finally asked him jokingly if she was someone I should worry about. He hugged me and said he was sorry, I have nothing to worry ab and he won't talk ab her anymore. Tonight, I looked at the new pics posted on Facebook, and in every one of them, he is sitting by her, helping her do something, etc. We have 3 kids together, and I would consider us to have a great marriage, but I can't help but to feel a little worried ab this, as I am about to uproot and move my entire life. Should I worry? Or is this normal comraderie, and it is okay? Thanks!