I’m not really hearing that any of these people are spiritually guided, they’re just people being people.
The aunt sounds like a textbook extreme narcissist. The best way to deal with those is to not give them the attention they are seeking - look up the “grey rock” technique - basically be boring and they’ll pick on someone else. Magick is notoriously difficult on narcs because the behavior is highly self-protective, they exist mentally in an alternate fake reality so their natural protections are through the roof. Avoid interacting with her as much as possible, use bindings to help keep here away from you and to stop her thinking about you.
Here’s my easy binding method: How to bind someones action - #4 by Mulberry or just look up bindings on youtube.
There’s no active issue here to solve? He’s on his path, you don’t approve of it, but how is he making it your problem? Or rather, what is it you want to do here? Be nicer to you? Maybe try a honey jar for that, if so.
You can’t “sell your soul”, that’s a myth and not how it works, so I assume you probably mean that he made what we would call a pact around these parts.
“Ex friend”. What he does with his sexuality is not your business, you’ve got some history and you’re not friends any more anyway. So this block is an issue, but it’s due to him not giving you closure or apologizing? It doesn’t sound like he’s psychically attacking you on purpose and this is more about your pain over the fighting than anything.
You can clear this block without addressing the emotional baggage that has caused it. I suggest you find a way to forgive him because that energy is unhelpful to you. He’s making sad mistakes but that’s on him, it’s his life and not your responsibility. Let it go - not for him, but for you and your good - and clear the unwanted energy. A good technique for this is the Water Method of Taoist Meditation to directly dissolve the actual energy block. It doesn’t need any long painful introspection or bringing up and reliving memories, it treats the block as a mechanical (kind of) obstruction in your energy system.