I live with my boyfriend and we have been very happy up until about 3 weeks ago. Since living with him I have realised the extent that talks talks online with female friends.
The first friend he spoke to every day or every other day and until I saw the messages I knew her to be an acquaintance. He would ask how her day was going, share their future dreams, send her cute dog photos to make her 'smile' etc. Finally he omitted her name when I asked who he was meeting one night (he met a group of friends I also know, she was there, he didn't mention it). I asked him to assert boundaries with her - he contacted her saying they were too close for a man in a committed relationship so he was taking a step back to focus on us.
Now I find out he's been confiding in another woman about us who I have never heard of. I asked and he said he 'barely knew' her but he's been asking her for relationship advice and again talking to her more or less every day. He talks about me constantly and the messages are banal chit chat, not exactly exciting.
This really bothers me and he knows this. He says he has booked a counselling appointment to deal with his need for external validation/get to the bottom of it. How serious is this habit for us?