Don't let some psycologically and emotionally fvcked mutation ruin your life. I've mentioned that keeping in contact and remaining in a relationship with a borderline personalited types that treats you poorly will steal your joy and your motivation. Toddster, it's time to get on with your life now or you will fall deeper into depression. Don't jeapardize your livelyhood over her (or anyone else) Push yourself and if you can't do it on your own then get some professional help to get you motivated once again.
Have you ever thought about going to an Al-anon meeting or a Codependents Anonomous meeting? Google will direct you to a group near you. You need to be the best you that you can be for your little one. She's off that pedestal you've had her on now so start looking after you and being the best you that you can be. Your kid deserves to be around a happy, well adjusted Dad.
“The willingness to accept responsibility for one’s own life is the source from which self-respect springs.” ~Joan Didion