OP, I know this seems complicated, but it's actually pretty simple... you and you BF already set this boundary with Logan once. He cut Logan out for 6 months. He can do it again. You need to put your foot down and stand up for yourself - don't make it about the wedding, you can't force him not to go, but you can make him decide between being friends with Logan (who sounds like an absolute piece of shit) or being with you.

It is completely 100% acceptable to say, "No, I will not be with you if you are friends with Logan." I would absolutely do the same. Logan is playing to your bfs ego about the wedding clearly, and unfortunately, your bf fell for it, so far.

To put it simply from jsut your post, Logan has

• sexually harassed you

• abused his power as Jay's friend to try and ruin your relationship

• is blatantly abusive to his gf

• is, pretty objectively, a sexist piece of shit.

You are PERFECTLY within your rights as a normal, lovely, sane human being to issue an ultimatum to your bf. It's you or Logan. Obviously, it's easier said than done, but the silver lining is that if he picks Logan, he's really not someone you'd want to be with anyway.

You are not AT ALL crazy for not wanting this dude in your life. You're not telling your bf he can't be friends with him, you're telling him he can't be friends with Logan AND date you.