I have been begging him for something, you know just something to show he cares
On the assumption that this is for real... I agree with everyone else that this relationship is totally bizarre. I cannot envision any circumstances in which an ostensibly sane woman ends up with 2 children and STAYS with the cocklodging sperm donor who doesnt contribute, doesnt interact, fucks other women, et cetera.
Where is your self esteem, your sense of self-worth, your back bone? When you got yourself into this situation, what exactly was your plan for your future, other than hoping this man would care for you and everything would turn out right?
Stop begging, kick him out, and focus on your children (who must be getting a very weird idea of what family life us like...).
And then take steps to grow up. Read some books about self-esteem, resilience and self-reliance. WOMEN WHO LOVE TOO MUCH and CODEPENDENT NO MORE are excellent books to start off with. Plus counselling, if you can afford it.
Sorry to sound harsh, but you need to take charge of your destiny instead of hoping forlornly and begging someone else to do it for you.