FMIL is draining my energy

Just here to say that my FMIL is so draining…and we still have 10 months to go. I’m not the type to back down, especially if it’s what I want for MY WEDDING, so it’s just an obstacle every day. Nothing will stop her unless I let her plan it all herself. It’s getting really hard emotionally. Nothing is good enough for her and no matter what I do or how much I include her, it’s “not enough” . I’ve talked to her, FH has talked to her, but when you’re dealing with a narcissist, nobody can really do anything. I had her on an info diet, she threw a fit. I invited her to say yes to the dress to make her happy, she was happy for a moment and now has issues with other stuff. She’s upset we can’t invite more people due to $. If she has a suggestion, she KEEPS bringing it up over and over, even though we’ve said no multiple times. Every text she sends is so unenthusiastic, and that’s what’s really getting me. I’m going above and beyond. Sigh. I’ve posted her before about FMIL but this is about the only place I can TRULY vent without upsetting my FH, which I understand. Any encouraging/happy thoughts would be really appreciated!