dp goes out every month with his best friend. His best friend does have a partner, but he's unfaithful. My dp is lovely. He's not the unfaithful type.
When dp and his friend go out, after a few drinks, dp's friend goes up to women in the bar and asks if they would like to join them at their table. Then, while dp's mate is all over one of the women in particular, the others usually talk to dp, and he has to make small talk with them. I'm really uncomfortable with this!