Is she putting her disastrous life on you?

It IS indeed possible to stay friends with people who aren't perfect by setting strong boundaries. I think that you should practice setting boundaries instead of looking for friends that are always in the right space for you.....please hear me out. :-) What I mean to say is that life is forever changing. Nobody will always be in a great place, not even you. If you're constantly letting go of people because they are struggling, you will always find yourself alone. And on the flip side, at some point you'll be the friend who needs support and you'll see how people do indeed "disappear" when you need them most. (It happened to me in spades.)

I can't tell you what you should do with this particular friend as I don't know enough details, but I don't think its always wise to just cut and run when someone is struggling.

If you don't know how to set boundaries in relationships, I highly suggest that you learn how to do that. It will keep people from walking all over you simply because you are "open".

I say all of this as someone who is INCREDIBLY open toward others. People misinterpret my actions. I have had to learn how to set boundaries in order to keep myself from being taken advantage of. And of course, some people are indeed "users" and its important to learn how to spot these people and be able to say "goodbye". In the end friendship is a two way street of give and take. Its important to be able to both give support and get support. If a friendship isn't working out for you and you've tried your best to set boundaries and keep things balanced, then there's no harm in moving on. You'll know you did everything you could to keep the friendship healthy but it just wasn't meant to be. Hugs.