Help. Is this normal?

Me and my fiancé separated 3 weeks ago & im constantly thinking about him and what could I have done better.. I literally dream about him every night. Is this normal? It this part of the process??? I have no energy because of how depressed I am. He was my first true love

Is this normal?

Edit: we separated because he became so emotionally, verbally abusive.. to the point I cut myself once because he would Slut shame me 24/7 and tell me how I was trash when I finally told him what I did (hoping) he’d finally stop.. he did.. he went MIA.. he went off with another female