I was talking to the leader of my marriage rebuilders class at church and he said it took him three years, three years!, before he felt he'd totally lost all feelings for his ex.
I bet he didn't follow what you are learning here. This is the beauty of detaching. If you work on you, and get comfortable with just being you, you will realize that no matter what, you will be ok. Get to know yourself and, here is the key, LIKE yourself.