So Long, Good-bye lyrics

this reminds me of me and my ex boyfriend.i loved him but i kept hurting him because of all my insecurities and problems. in the end he had to do what he had to do to keep himself from being hurt anymore. no matter how much i cried and said i loved him,he left.sometimes we do hurt the ones we love,because we know they will always love us and forgive us.or so we think.when you go around hurting yourself just to feel something,hurting others because you dont know how to be healthy emotionally,people finally stay away. you think people push you away,but sometimes its you pushing them,so they start pulling away.
sometimes love just isn't enough.i think he wants them to be together,but only when they can stop being hurt.

He's trying to escape his girl because she's on drugs and he wants to be above the influence...

I think his girlfriend is on drugs and he is leaving her.

I believe it's about a guy leaving a girl, or vice versa, because in their particular situation, it's the right thing to do, beacuase part of the reason he's leaving i because of all the stuff she's lied about and because they're just so different. And because the person leaving is completely sure of that it really is the right thing to do, her begging and crying can't change his mind.