Walk the Line

I've never been good at finding the line...Such is the case here. I feel wronged and I feel it should be corrected but am I incorrect? should I appologize and risk being wronged again? Or hold a grudge and risk becoming bitter?
How do you know if a relationship is worth being fixed vs. one that is abusing and toxic and needs to be terminated?

Maybe you are intentionally screwing me over, but maybe you are just reacting to my withdrawl from the situation. ...so what do I do?

And mybe I am just jealous...so what happens now? I don't know how to take a step backward...So I guess we aren't friends. And that is devistating. I loved how accepting you were, and I'm going to miss it. But I can't function if I always have to think "What's she got that I don't?" "Why aren't I good enough?" I don't want to be second place, and I can't watch from the sidelines, just waiting foryou to notice me, then go running into your arms.
...and I have a secret I can't trust you with, so how can I cry in your arms without explaining why? I can't.
I don't know how to fix this but I don't know where else to turn