If someone you use to like or even love, turns into a cold person after ending things then that means they had real feelings for you. You meant a lot to them. They had a soft spot for you. And they trusted you. They’re going to start pushing everyone away because of one person and that’s you. You’re the reason why they don’t trust anyone anymore. You’re the reason why they don’t want to love anymore.
Why is this person so cold now? Why does this person keep pushing everyone away? How much pain did you give? What did you do?