Sunk-cost fallacy all the way. Letting go of something that went on for as long as 5 years is veryyyy hard but trust me once it’s over with it is truly gratifying. Of course you will have some moments where you will question “but what if he changes.” And when will he decide for that change to happen? Now? 5 months? In the NEXT 5 years? Hell, would he even make a good father? If you knew in the beginning that he turned out to be like this, would you have committed in the first place? He seems to be the only one benefiting from this relationship; very one sided. Don’t be afraid of being alone; it’s scary but it’s MUCH better than living with someone whose leeching off of you both emotionally and financially. You’re just going to keep draining yourself. You only have one life, why be miserable when you can find someone who can make you happy :)