L.D.
Forgive my bluntness, but he sounds very manipulative.He wants it all and he's been getting it - from you and from his girlfriend.
1)You are not responsible for this other womens decisions in life - you do not need to talk to her about anything or "warn" her. You are biased anyway and she wouldn't take you seriously.
2)If you think there are some serious flaws in him (DUI, lives with parents etc)and wonder why she wants him - why do YOU still want him? YOU DESERVE BETTER. However you need to become ok with being single, and become happy with yourself. Only then will you be able to see and appreciate the other men out there that are of better quality and better for you.
3)You need to focus on yourself and your self healing. You can never get over someone if you see them so often. Your daughter should be dropped off to spend time with him while you do something else for awhile.
4)In addition your daughter doesn't need to be confused thinking you 3 might still be a family, especially now that there will be another woman entering the picture on a more permanent basis. Distance yourself from him. You are her mommy and he is her daddy and you are SEPARATE households.
5)Do you have any formal support arrangements? It does not sound like you have. I suggest you make arrangements for child support and custody agreements, because once you start getting your life together he may not be so cooperative with you anymore. Look around for low cost/sliding scale legal clinics to help you.
6)Seek counseling. Severing of emotional attachments is difficult and many people can use help in this area. You can often get help through your church, public support groups (often listed in the newspaper)or from a suggestion from your doctors office. You may even want to seek the help of your medical doctor for a short course of antidepressants if you are severely depressed, crying and unable to function. Do you have any COBRA health benefits through your former job? Do you qualify for medi-cal health care benefits?
7)Look for another job not only to keep yourself emotionally busy ( and less prone to depression), but to be financially independant for your daughter.
I am not an expert in community resources. Pehaps some other mothers will have more information regarding community resources and groups that you can contact for help in these area.Remember - you can be strong when you need to be. You can do this. Best of luck to you and your daughter.