Can he take the children from me if I move in with another guy?

Go to a women's counseling center and understand what issues you may have personally. You need to provide for the children and if you cannot do it on your own, then you have to get child support from the father. Unless of course you want CPS to take them away from you. File immediately for custody and child support and don't worry about the man who apparently doesn't care that he is a father and has obligations to his children. If nothing else, talk with a local attorney about your options.

No, he cannot take the children from you just because you move in with another guy. Only if the other guy is a child molester, or has a bad criminal record. If he is an okay guy, you are ok.

You can move in with the other guy as long as he is not a "danger to the children," e.g. drug user, convicted sex offender. You should go get formal custody order in place. You can go to the court house, obtain the packet, fill it out and serve it. While you may not "want" child support, the custody order is crucial because as it stands now, without a custody order, if the father comes and takes the children, there are no contempt actions or criminal actions for you to pursue.

If he is on the birth certificate and there are no court orders then he has the some legal rights as you do. In order to prevent him from running off with the children, you should get a court order. How is it in your children's best interest for you to not get child support?

No, he cannot take them away from you just because you move in with someone, unless that person somehow poses a danger to the children. As for the father's rights, if you are in Florida, you should consult my website for more information on that subject. Technically, he has equal rights with you, but they need to be established by a judge.