Women who love too much and confusing love with obsession, are the ones I found helpful.
If it makes you feel any better, in one of those books it says something like 'when addictive relationships end it is normal to doubt one self, as this is the nature of addiction.'
That's probably not word perfect but it helped me seperate the grief that I felt (which is normal) and that overwhelming desire to go back to him/get him back (which is the addiction).
Take it easy
:ghug3