There is a fine line between helping someone and enabling them. Personal growth should not come at the expense of lowering yourself to uplift someone else.
It is okay to let someone who is close to you know that they are draining you, and as someone who cares, they should receive it to act accordingly.
Before helping someone else, always ask yourself; am I in the right mental space to carry the weight of someone else right now?
A relationship of any kind is a 2-way street of give and take. One should not outweigh the other.