A couple of days ago I was sitting next to my DH when a chat head from FB messenger popped up. I couldn't see it clearly but it was a female. Anyway- fast forward to today and I've noticed this person has liked a pic of DH. I just felt uneasy so I searched her name and it came up with lots of DH commenting on her pics, liking and loving posts etc. He knows her from an old workplace he was briefly at. I asked him outright if he had been messaging her and he said yes. I asked to see them and he did show me them. All just friendly chit chat and she had messaged 1st. I'm feeling a bit mad over it all though, I feel like hes crossed a line. The comments and likes on pics etc are a bit much imo. Hes really made an effort to interact with her and now she's begun messaging him privately I feel like a line needs to be drawn. She is also single. Or am I just acting ott?