[pure_simplicity]

I think the OP meant that friend support you in overcoming your limitations. They support you where you are weak, not they perpetuate and grow your weaknesses.

[em-bee]

or they accept your weaknesses and support you despite them.

[dirtybirdnj]

This is how I chose to interpret it as well.

If you can't handle me at my worst you don't deserve me at my best is a cliche way of saying the opposite.

[arolihas]

I hope so, the way it's worded implies the opposite.