It is also equally important that said support system is honest. I would rather someone be honest about time, energy, availability, and capacity than try to be there for me, only to be resentful or regretful later.
Speaking as the one from the support side, I have been more proactive in protecting and preserving my energy. I can't provide you with full, undivided attention if I'm divided and have needs that require attention. It would be a disservice to myself and to you.
Before I conclude, I would like to thank those who have listened, provided insight, checked on me, and thought about me. It was murky for a hot minute, but I'm getting to the other side.