When you lose touch of your heart chakra,meaning your chakras are out of balance, something in your life is bothering you,like something on the physical like your root,sacral,or solar plexus chakra which are the lower chakras, or your out of touch with your throat,third eye, or crown chakra, you should regulate self an meditate
I don't really know, it took me 3-4 years to get out of it and I don't really remember how I got into that state in the first place. Weird thing is that anime is what got me out of it.
i read somewhere it's got something to do with media. for example we easily tear for a sad tv show/movie but not so when sad events happen to our close ones, or we get exposed to much to advertisements (a lot of them triggers emotions to attract customers) that we gradually turn 'numb'
Oftenly related to childhood experiences, it can be caused by your parents divorce, the death of someone very close (e.g. mother, bestfriend or husband) or a the loss of something material but very important (house lost in a landslide, for instance), but, in contrast to public superstitions, it is not linked to traumas in former relationships, specially with men in this particular case. It could be said that it is in general a major change in your life.
There were occasions when letting go and moving on from a person I extremely care about has resulted to benign indifference, either after the Depression stage or the Acceptance stage.