First anti depressants are least effectice on reactive depressions and more successful on chemical inbalances which is not your ex's case. It sounds like he is running away from everything thinking that this, including the divorce will relieve him of his depressive state which certainly is not the case. I would leave the channels of communication as open as possible. There is a chance that when he realizes his running including from you that there is a chance that you were one of his strong support systems and he may wish to return assuming you at the time feel similarly. Be sure to avoid pushing-leave things open ended. I have been involved in several cases where a raproachment took place 6 months to 2 years after the divorce. I would not place a great deal of hope as that is just setting youself up to be more depressed should he not choose to return. I wish you the best.
If you require further clarification or more information, feel free to ask!
what is effective in treating reactive depression?
Could the depression be causing him to lose his feelings of love for me and is it possible that these feelings may return when he/if indeed he ever feels better?
. In CBT, one is taught new ways of thinking and behaving and as a result, one's mood improve and anxiety decrease. In addition CBT is evidenced based as the most effective form of treating depressin and anxiety. See:
As I stated before the depression could well be the cause for his loosing positive feelings for everything in his life, including you and it may be possible that when and if his depression lifts he will seek to rekindle his loving feelings towards you. There are no guarantees, but it certainly can happen and I have seen it occur.