if he's only angry with you because of the uninvite, then he has good reason to at least wonder about the causes behind it, and since she's his girlfriend, he no doubt expressed that to her. she, naturally, would wonder the same thing for at least a second or two. fact is, any reason they could imagine you having would lead them to suspect you still have feelings for her.
this, could and probably did, cause him to be leery of you. she, being that she's not with you and is with him (a sign that she prefers him - not that he 'got there first'), almost definitely came to her own conclusions about your motives and sees right through them. they are rather see-through. and, being that it's him she wants and she can't miss you wanting her anyway, she probably didn't need his opinion at all. he wouldn't have to manipulate anything.
you're the one that sounds manipulative. in your attempts to control the situation in your favor, you're asking for opinions that will help you figure out your next move.
if it's her feelings/thoughts about you that you're concerned about then stop doing things that make you look like you have no control over yourself.