Abusive ex

I recently broke out of my domestic/abusive relationship.. And told my ex to pack her shit and to get out of my house .. She won't stop messaging me.. But the problem is I'm having a hard time being alone , I am doing okay, I haven't seen her in 2 days, because i have told her I don't want the relationship anymore and I have wanted this for along time .. We were together for 3.5 years! I have my own business so it's hard to just change my number .. But my problem is I know I won't go back to her as I don't love her Like that anymore and I just Want to know when I'll stop feeling the need to message her back!! :(