Synchronicities do have a purpose in our lives. Many people here could probably tell you of their own "coincidences", when something in the outer life happened which reflected tremendous inner changes happening.
If you feel like you stepped back, today, on the roller coaster for a few hundred feet of the ride, maybe that was something you needed to feel: how terrible it is to be involved with someone who is unstable, narcissistic, and always puts you last.
Then our next step is to examine ourselves and find out why we are so hooked by addicts.
Wishing you good insight and eventual peace of mind.