Hi Irishsj,
I am so sorry you are in pain. It does sound as if your ex is giving you very confusing mixed signals. It's hard for me to say whether you should try and rebuild the marriage or move on with your life. It's extra hard when you have children together, because that means having to see and be in contact with him all the time.

I know you said he tried bringing up the relationship and you told him to stop because it was too painful, so maybe when you are feeling more up to it you can talk to him heart to heart about everything. (I know it's hard). But maybe you can get to the bottom of his "'mixed signals" since he seems somewhat confused. In my opinion, it sounds as if he misses you, although I don't know why he would say there was no way things would work out and then be kissing you. Like I said, he sounds very confused.

As far as getting over an ex, I find it to be easier as time goes by, or if there is something that happens to make you fall out of love with the person. (Then it's super easy ) but if there is still love there and that person is giving you signals they want to work things out, then it can be harder to move on. (I have been there).

I hope you can get this worked out, I support you in whatever you decide to do. Take good care of yourself, ok? Also, feel free to pm me anytime. I know you will get through this.

Love,
Sujin