How would you feel in my shoes? Any help?

You sound like an AMAZING!! guy...you deserve so much better than that. A girl that is going to help you with the house work and appreciate what you do. I would suggest that you never leave the babies life and start your own life away from her seperate. Get joint custody... Cuz honestly you need to get away and get a better life, you are too good for all that. She is one of those girls that dont realize what she has untill its gone.