How long does it take?

How long does it take to get over a divorce? I was married for only one year, but with my husband for a total of 4. We divorced in June (I initiated it) and I am still hurting because I loved him dearly, but knew it would never work out (narcissistic traits- him). However, has moved on already and in a relationship with some other female. We have a 1 year old daughter.