he would never have gone through with meeting any women it was just chatting through boredom
Ah boredom.
He's got presumably a job, a lovely partner, at least one son, other family, presumably a few friends, hobbies (?) and he could do literally anything to relieve his boredom with all that.
Other people take up sports and hobbies, read, go to the pub, game, tinker at vehicles, do courses, watch series, tik toks, YouTube etc etc etc.
But he goes on dating sites and contacts women and moves across to messaging them in messaging apps to "relieve boredom".
His method of relieving boredom also requires lying to his partner, because 99.9% of people wouldn't stay with someone who did that.
And of course, if op chose to relieve her boredom in that manner, he'd be perfectly chilled and ok with it. In fact that's why he told her about himself doing it. And that's why he asked for exclusivity.
He was never going to meet anyone; well he looked very much like he was moving in the direction of meeting someone.
Say he wasn't; still not remotely appropriate behaviour.
It would also mean that he wastes women's time who are looking to date and looking for a relationship, to relieve his "boredom" and amuse himself. What integrity and decency.
He looks like a cheater, cause he is a cheater. And I bet his marriage to his ex fell apart because of it too.