It is what it is. I've been saying that a lot lately.
Chicks like you, and while they like you, they like you. If they really like you, while they really like you they really like you. When they stop liking you, they don't like you anymore. They may go from really liking you, to just liking you, to not being sure if they like you, to pretty sure they don't like you, to not liking you, to actually disliking you.
It's hard to think these are the same girls that were so kind and attentive previously. The demon seed is in every woman, whether or not it comes out, depends on how you act, and what her character is like.
Think about all the people that get divorced. They want to literally murder each other sometimes, and will dedicate the rest of their lives to destroying each other, will use their kids as tools to hurt the other.... and these are the same people who were 100% convinced they would be together for eternity holding hands and singing songs.
But to the topic, women can turn it off much quicker. It's in their genetics, they need that security, maybe they truly did like you before but when it stops it stops and they are on to the next dude. All no contact can really do is mess with her head and make it harder for her to move on because she's not sure you're dead yet.