The LRT is partially, also, to give you a sense of dignity, strength and control of your own life. Remember, you'll be fine without him. He needs to know that.
I would suggest speaking to a good divorce attorney, not necessarily to file, but to get good feel for what are your RIGHTS and what you need to document NOW, in case things go south so that you keep the house and that your son has a stable home to live in. This seems scary, but it will empower you. DO NOT tell your husband you are seeing an attorney.
At some point, you need to figure out what your husband is doing with other women. It goes without saying he's endangering your health if he's sleeping around. So, no sex until he can attest with some credibility that he's not seeing anyone else and that he's clean.
It's simply a matter of tending to your own needs, taking care of yourself, and showing some self-respect. YOU are the PRIZE he's walking away from. Don't forget that.
