Supporting Somebody With Serious Illness
A boundary can sound harsh when somebody you care about is struggling.
A boundary can sound harsh when somebody you care about is struggling.
You may think: “How can I say I can’t talk tonight when I know they’re having a difficult time?”
But a boundary is not the same as withdrawal. It is a clear description of what you can and cannot sustainably offer.
Without boundaries, support can slowly become resentment, exhaustion or a relationship in which neither person feels secure.
Start with the pressure point, not a list of rules
What is actually becoming difficult?
Perhaps late-night calls are affecting work. You are cancelling your own plans repeatedly. You are expected to reply immediately. Every conversation lasts for hours. Or you have become the only person they will contact.
Choose the specific problem that needs changing rather than announcing that you need “better boundaries” in general.
Say what you can do as well as what you cannot
A boundary can contain connection.
“I can’t talk for two hours tonight, but I can call you tomorrow morning.”
“I can’t keep checking my phone during work, but I’ll reply when I finish.”
“I care about you, but I can’t be the only person you talk to about this.”
This is clearer than disappearing because you have become overwhelmed.
Do not wait until you are furious
Boundaries are harder to communicate after weeks of resentment.
Notice earlier signs: dread when the phone rings, irritation at every request, poor sleep, avoiding the person or feeling that your own needs no longer matter.
Those signs may mean the current arrangement is not sustainable.
Expect some discomfort
Setting a boundary can produce guilt even when the boundary is reasonable.
The other person may also be disappointed or anxious about the change.
Discomfort does not automatically mean you have done something wrong. Give the new arrangement time rather than immediately abandoning it because the first conversation was difficult.
Share responsibility where possible
Mind recommends being realistic about what you can do and finding other people or services who can share support.
If you have become the only person carrying the situation, consider who else could appropriately be involved.
A wider support network can reduce pressure on the relationship and reduce the other person’s dependence on one individual.
Keep some time that belongs to you
Breaks do not need to be earned by reaching exhaustion.
Protect regular time for sleep, friends, exercise, hobbies or simply not being available.
If appropriate, tell the person when you will be unavailable so the boundary is predictable rather than feeling like sudden rejection.
A boundary should protect the relationship, not punish the person
Avoid using boundaries as threats or as a way to force somebody into treatment.
The aim is not: “If you don’t get help, I won’t speak to you.”
The aim is: “This is what I can realistically offer while also looking after my own wellbeing.”
That distinction matters.
Last reviewed
6 September 2026
Important informationThis guide provides general information only and is not a diagnosis or a substitute for professional healthcare advice. Supporting someone else can affect your own mental wellbeing. If you are struggling, consider speaking to your GP, a counsellor or another appropriately qualified professional.