Letting go is a grief process and usually goes in cycles...as in there may be a feeling of relief, then pain, then wondering, then shoulda-woulda-coulda bargaining...then relief, then crying. It's not crazy, it's grief. In the case of a break up for reasons of addiction and abuse there is going to be very very fertile ground for you to learn from. With some time you will find that your tears are nurturing your inner garden. Time will be your friend. Reach out. Take nice baths. Yoga. Walks. Yes.
As for your ex...you can pretty much absolutely be sure that he is NOT in recovery. If he had his foot in a recovery door he would not be treating you this way. You don't have to waste time wondering if he is getting into recovery. If in the future he does you will know because he will want to make amends. If he comes to make amends it will not be him saying he is sorry so that he can get back together with you. Amends are about action...not saying your sorry.
If by some chance in he!! he is in another relationship it is sure to be unhealthy because he is not in recovery. And people who try recovery and do so for another person almost always fail. One has to do it for oneself. It's an inside job. The love of or for another person is not the healing catalyst...it is between each of us and our inner and higher power of love.
Whether we are addicts or codies or both...the message is that you must learn to love yourself. Sometimes we project our needs and wants and deep yearnings on to other people...hoping they will fill the hole in our heart and soul. But what we all are here to learn is that we can only really have a healthy loving relationship when each person has learned to love themself...then, and only then, can you really love someone else. And then you will KNOW if they love you too, because they will take loving care of your heart...they won't abuse it.
peace.