HELP. I'm In A Glass Case Of Emotion! New SO and the unfriending of exes: To do or not to do?

My (27/f) boyfriend (26/m)--granted, of only 2 months--doesn’t think he should unfriend his ex girlfriend of 6 years on Facebook. I never asked him to do it outright, but made it known that I didn’t appreciate that she ‘liked’ his every post. She even recently posted a link on his wall about a tie thing he used to wear. She knows he has a girlfriend and he said she’s talking to someone else. (NOTE: I ABSOLUTELY HATE that Facebook can cause stupid drama like this.) I completely understand that everyone has a past. I’m still cordial with a few of my exes (even friends with one from high school) and I understand that they probably have a lot of the same friends (I mean, SIX years), but should I be okay with that?

BACKSTORY: When we first started dating he mentioned that he had just gotten out of a super-long term relationship a few MONTHS prior. I recently came to find out that it was a WEEK before we started talking. (They had officially ended it months prior but still had been hanging out.) When we first started actually dating, she called him, his work and his friends a few times trying to talk to him, but hasn’t really made an effort to talk to him since, other than the Facebook junk--that I’m aware of.

This has honestly been the happiest relationship of my life--and I’ve had a few 2+ year relationships. I’m not sure I’ve ever been this in love. He says he doesn’t care about her at all and that I mean more to him than she ever did (from what he’s told me they had a strange semi-long distance relationship) but he’s also repeatedly said that he didn’t understand what the big deal is about the Facebook thing. I know guys are wired differently, but I’d probably be completely fine with her being his friend if her face wasn’t all over his page. I’ve never been the jealous type and do trust him but I can’t help being incredibly bothered by this.

LADIES, please tell me. Am I wrong? Isn’t it common courtesy to NOT post on your ex’s Facebook, especially when they have another significant other? Help. I can’t let Facebook or a silly girl get the best of what we’ve got going.

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