I personally think you need to take a step back and not step onto the dance floor with him so often.
1. He isn't ready to work on the marriage, he will come to you when he is.
2. EA or PA.... What's the difference? He isn't "in" the marriage while either one is going on.
3. If he is only going to give you $$ for necessities NOW and I can't stress this enough NOW is the time to see a lawyer and if you have to file for legal separation (doesn't mean you have to divorce) to get a court ordered child support AND support payments for YOU. The court will take into account you are a SAHM and he will be required to "maintain" the household for a period of time.
Do NOT let him turn things around so you feel like you are doing anything wrong.
Me: 35 husband:39 Sons 16 and 11 from my first marriage Twins 5 (boy/girl) Daughter 3 Affair bomb 2/27/14 He moved in with ow 3/13/14 OW kicked him out 6/15/14 4/2016 he seeks help for sexual addiction