Why is my ex so cold towards me?

Anonymous
He ended it 2 weeks ago kind of unexpectedly. when i saw him earlier in the day he was loving and sweet.. totally himself. When i left he told me he loved me and couldn't wait to see me again in a few days.
A few hrs latee he dumped me over text. Just saying it was over and no explanation as to why.
He won't return my texts for the most part. he finally responded when i askex for my stuff but he just left it on porch, doesn't want to talk nothing. im so hurt by this, he's in his mid 40s and this not the thing id expect from a grown man. especially with all the amazing things we did and had so much in common. our kids also got along. its heartbreaking. advice?
Updates:
+1 y
We were together 2 years.
Why is my ex so cold towards me?
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