Face all of problem together with him. However, you have to remember that it is not possible ask another people to change his character. Think about it. Are you too passive, too possessive, nor sensitive, does not want to listen, not capable to empathy with your ex? Discuss with your ex, and think about what you should do to fix this thing.

Both of you need the commitment. Admitted that you have important role in a problem is the part of self-recovery. Reestablish your love foundation by starting to make a commitment to handle problems that both of you will face. This thing needs some times, so you should learn about patience but keep consistent.

When both of you talk about what should be change in a new relation, try to not critics or blame each other. Be focus with what thing that will be your responsibility and ensure that your ex will do so or suchlike.