Stop lending your calm to people who keep spending it on drama.

Calm is a resource, and it can be spent on other people. Some friends arrive in crisis, borrow your steadiness to settle themselves, then walk straight back into whatever produced it, which leaves you supplying stability for a life you do not control. Caring is not the problem here. The problem is an arrangement where the calm flows out and nothing ever changes.

You can listen without becoming the shock absorber. Give those conversations a length and keep to it. Offer help with what somebody is actually changing and rather less with what they only want to describe.