You are lucky if you find people to stick with you in bad times especially nowadays. ~ Anewor Gamilac
If the person staying by your side is loving, kind, understanding & supportive, then they deserve to be with you. If the person staying by your side is lying to you, manipulating and mean, you can stand alone.
People who bring the stress in you 
Timing is everything 
When you cannot sleep at night 
Let go of past resentment