I cant seem to stop caring...

My husband and I separated 4 months ago. We have an 11 yr old Boy, 7 yr old Girl and I'm currently 27 weeks pregnant. He said he didnt want to keep lying to me and hurting us. This being drugs, drinking, lying, girls, etc. Well I recently decided to stop all contact with him, but last night I just had a bad feeling so I checked on him, old habit. Well he answered at 12am that he was fine, so I went to sleep. Well this morning the kids were waiting for their dad, since he had promised to take them out today ( he rarely sees them). And well to my surprise he didnt even sleep at his house and ignored this kids calls and just sent a message saying he would pass for them later.

I mean I'm not stupid, you went out all night, probably stayed the night with some chick. And now you want the kids to wait on you. I mean I'm just so pissed and disgusted right now. How could I have ever loved this man. Why does it still hurt when will I stop caring so I can finally move on.