The risk of sticking your neck out for someone who you trust is that they will let you down.
The risk is not sticking your neck out for someone who you trust is that you will let yourself down, knowing that you could have helped but didn't. Trust until or unless trust has been broken.
Everyone needs help once in awhile, and everyone is in a position to help once in awhile.
Being there for eachother is a gift well given and received.