How do you set boundaries without looking like the difficult bridesmaid?

I love my friend and I’m happy to be part of her day, but the expectations are starting to pile up, events, costs, constant planning, and group chats that never end. I don’t want to be the problem bridesmaid, but I also don’t want to go broke or lose my sanity trying to keep up with every request. Has anyone found a polite way to push back on certain things without causing drama? I’m trying to support her, just not at the cost of my wallet and peace of mind.