I've been having lots of dreams about my xH lately too.
In some ways it's nice -- b/c it is almost like a visit with him. But also sad b/c they are so fleeting. And they evoke so many memories.
I feel as if God is trying to relay a message through the dreams -- but I'm not sure what message. They are active dreams where we are connected in some joint activity. The only thread of consistency in all the dreams is that we're comfortable with each other -- and seem to be a part of each others lives to a degree.
Messages abound in our lives if we pay attention. But dreams are very difficult to interpret. But, I do think God is using your dreams to communicate or unmask something for you.