Heartbroken and lost

About a month ago my fiancé told me he had no feelings for me anymore. I was absolutely heart broken. He was so blunt and unemotional and when I got upset he told me to suck it up because I'm a grown women. The thing that upsets me most is that we have two gorgeous baby boys. They are 1 and 2 and I would never have wished this upon them. He convinced me we would be together until we were old and grey. I feel so used like his sole purpose for our relationship was to have babies and leave me, to live with his elderly aunt and raise my babies. I am still living with him because we can't agree on custody and its a living nightmare. Pretending everything is fine in front of the kids and feeling so hurt on the inside. The whole time he has shown no emotion at all. I can't believe he can just throw it all away without a care. I'm just not coping very well. I'm trying so hard to make sure we are doing right by the kids but its getting harder and harder for me to hold it together. My parents keep saying just take the kids and live with them but my ex is unpredictable and I'm scared to make that move. I don't know what to do

what do you want now do that,dont let him use you anymore.take coun to get over any negative feelings dump him and start again