metalchick, I am sorry you are so stressed out. You really are maxxed out right now.

What you describe sounds very unfair. If you are paying all the bills and he is adding nothing, what is in it for you with him sticking around? At least if you were separate you might get child support. Who else can you talk to? A therapist or social worker could be a lot of help.

If you are working 60+ hours plus weekends on salary with no overtime, that sounds like a very challenging job. What other options might you consider for another type of job?

Everyone chooses their situation. Sounds like you might be in danger of succumbing to exhaustion and stress or overworking and the neglect of your "partner". I really think you could use a professional to help guide you through this situation and teach you self care (exercise, yoga, good food, enough sleep, having re-creation activities.

"I just thought to myself that I guess I not worth it. " is what you conclude.
I would pose another question, since you are doing everything, paying for everything and he is out partying, Is he really worth it?