Is he cheating?

So recently I discovered my husband talking to girls on Facebook. I asked who they were and he told me just friends from his country . Then he said I could look at the messages if I wanted. So I did a couple days later and saw that he deleted some from this girl. I asked him your he did it and he said so it wouldn't cause any problems between is because he knows am jealous and that she was just a friwnd. He went on a trip to Puerto Rico and saw her she even sent pictures of. Them to his phone . I'm I making this up or is he cheating.