EDIT: YES, DP can be trigger by anxiety from breaking up with someone, it was a big part of mine. Can it be chronic because someone took your soul? NO...I don't believe so. My break up had a huge part in DP, but it may have taken a few years but that part of my life has let go. It will take time but you won't always think that you are separated from your soul mate. Takes time, no one can say how long, but you realise some day that you had to make room for something in your future, sometimes that isn't clear for a long time, the best advice I can give from the HELL i went through is learn to be happy with yourself, love yourself and the rest will come in time
