I want a quick advice here?

So I have two best friends from different places, one from school and one from college. Let’s call them A and B. So earlier B got cheated on and A was the one because of whom we all got to know. Now it’s been 2-3 months since but B still gets triggered from certain things because she hasn’t fully moved on and which is fair. I understand that. But we’re having a party tonight and B doesn’t want me to invite A because she might get triggered or something. I completely understand, but then I cannot just not invite my other best friend.
It’s a party with my college friends, whom A doesn’t know well, but we’re also inviting 3-4 people outside our college.

So now I’m lost here. I don’t know what to do. B is right in her place but then I can’t lie to A. Plus, I can’t tell A this situation cos I don’t want any hard feelings between them both.

So, what should I do? I know this is very petty but I still can’t seem to get a solution so help me out thanks😂
I want a quick advice here?
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