Is it wise to keep in contact with a commitment-phobe ex?

We ended things because he was "not there yet" and was finding it hard to give me what I wanted. I have cried and gone through the motions. The thing is, he wants to stay in touch? We don't live in the same country now so I don't understand why? It kills me to stay in touch but at the same time I don't want to jeopardize any chance in the future that we may get back together when he is "there". Help please!
Is it wise to keep in contact with a commitment-phobe ex?
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