After breakup with best friend?

I have a best friend but we live in a different country now. We've been best friend for about 6 years. This year he confessed and we started dating. But since we are currently in a long distance, it's killed him not to see me in person and not being able to do things together. The relationship last only 3 months. He said he wants us to be back as a friend but maybe not like before.

Now, 2 months after that breakup. He seems like keep pushing me away even if i start with a light convo. Sometimes when i texted him first about something funny, he only replied with thanks and said he wants to have a rest. But sometimes he also texted me first saying he wants to talk with me and not after that he pushing me away again.

I am so confused with his behavior and whenever i asked him about it he just said he needs time to rearrange his mind cause he has a lot of problems lately but on the other side, he doesn't want to tell me about it.

Tell me what should i do? The distance between us growing apart just because we decided to date. Does it means he hate me now? And want to become a stranger?
After breakup with best friend?
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