I'm so scared of being on my own
Are you so scared of being alone that you are willing to sacrifice your child to this relationship OP? Because that is what you are doing, your poor DC has to watch this man take their mother apart bit by bit, day by day all because you "love" him. They have to watch this and eventually they too will be emotionally, verbally and mentally abused by this man, you need to protect your child.
Nothing is ever his/her fault.
He/she is self-centered.
He/she intimidates you when he is angry.
He/she has double standards.
He/she treats you differently around other people.
He/she appears to be attracted to vulnerability.
He/she has an attitude that they are superior.
Other signs of abuse:
He/she retaliates against you for complaining about his/her behavior.
He/she tells you that your objections to their mistreatment are your own problem.
He/she gives apologies that sound insincere or angry, and they demand that you accept them.
He/she blames you for the impact of their behavior.
It’s never the right time, or the right way, to bring up things.
Just read some of these signs of abuse OP, maybe read at the link, this is you, this is the life you are living, this is the life that you are forcing your DC to live.
This man's behaviour is designed to cause you stress and anxiety, to keep you guessing about what is the "correct" thing to do, it is designed to keep you weak and vulnerable, to dance to his tune and to keep you under his control.
ccada.org/signs_of_an_abusive_person.aspx