Support comes in many forms, and sometimes that form is simply providing the comfort of another’s existence for them. Silence speaks volumes and if that act is what is needed simply, then the best thing you can do for them is to oblige. To whatever extent we like it, more often people know exactly what kind of support they need. That inherent knowing is of an intuitive intelligence, where one surrenders to their emotional plight and finds themselves with answers for support, the issue is then how does one express it rationally while in such a feeling state. Do the best you can to support them, it is part of the network and one of the highest callings as a friend and companion in this existence. Sign up to have their good, their bad, and their ugly. Worthy of any one of those three, so long as they include the other two.
Meditate.