Don't think too much of your hb, and don't think highly of the 'love' you think TOW has for your hb. Crying doesn't equate to love, because you can cry to get your way (if you know how to exploit the situation). Is that love? Ya, right, love for their ownself.
You lingered too much on your problem. Would you think your hb is a good influence to your kid? Not meaning to condemn people with STDs and sorts, but basically what I see, it's a case of lack of discipline in a person's life. Do you want your kid to have such an influence in his life? After divorce, you may have joint custody, at least that's better, because if you get care and control of your kid, your kid stays with you and emulates you. Rather than spending more time with the father and drawing on the negative influence from him, hopefully you, this mummy is of a positive or better influence. It does help your child to learn in life, at least positively hopefully. And when your child meets up with the father, at least it's minimised contact. It won't amount to such a great negative influence.
Hope you be strong and get out of the negative life.