Still finding it hard to cope..

So its been days since i have seen or spoken to my ex..

I knew i was going to have these ups and downs trying to forget about him.. But every now and then he will text me either in sadness and tell me how much he misses me, or will text in anger calling me names. I have tried my best to ignore and have acheived so far.
Knowing he's out partying away, getting with girls and having the time of his life is honestly getting me down and making me feel sick to my stomach. I dont even know if i even miss him...I just keep having these awful bouts of devastation over it.

I am not going to go out and party away.. Even though i would like a few good nights to make me feel better..
1) i have a daughter and dont go out often anyway..
2) i work full time and trying to concentrate on making the money for me and my daughter.

Its just so annoying that me leaving him is harder for me than it is him, even though he was the prick..
It just angers me and gets me down when im at home on a night alone.. :sad2:

Can somebody give me some insight on this breakup business.. I just never felt this way before.. Its anger, jealousy and sadness mixed into one.. It sucks ..