Why are things awkward between me and my ex? We used to be so close.

There a happiness but an awkwardness that comes with being around my ex. I think he feels it too, because once he starts being comfortable and chatting with me he immediately tries to ignore me and seem uninterested.

we used to be so close and most of the time we have like a 5 sec conv. but he talks with random people so much more than me. So why is he uncomfortable to be with me?

or what is your interpretation of his behavior?
Why are things awkward between me and my ex? We used to be so close.
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