Dear SirGolith,
These rollercoaster of emotions and feelings are part of grieving for a relationship that you wanted to last.
We are many here at pc to support you, although we can't take that internal pain away,
we are here/ we have been there/please, tell us what you need.

Start by practicing "no" in your mind. People like him will never accept full responsibility without a "but YOU" ect.... His emotional mind has been injured, this is why imo he needs professional help alone. You are more advanced emotionally bc You see and know where you need help to heal.

I am glad that you found pc!
There is a group "Sanctuary for Friends of Angels"
Its a place where you can lay down your burdens and rest for a while, you can find it on my page, check it out. There are no judgements and we are friends who help oneanother
There are other groups as well. Find what works for you.

You are a good soul and believe me or not there are many good men that will love you outloud, who are loyal, and will be the right fit for your son.

Keep in touch and try to have a relaxing weekend, go for a walk with your son.
Allow him to express how HE FEELs about things, so he doesn't hold it in.
Validate his feelings age appropriately. Dont make promises you can't keep, but reassure him things will be better. His love for you is pure and he wants his mom to be happy.
ME too!
Sincerely,
H.