Is he regretting his decision?

Hi, I dated this guy for a month about 4 months ago and we got it off really well. We liked each other a lot, but he decided to end it because his family did not like the fact that I’m not from the same country as they are. He also told me that he’s not ready for a relationship etc

i cut off all contact with him, and out of the blue he started to follow me on Instagram yesterday after four months. This got me confused but I followed back. He then unfollowed me and removed me as his follower 5 minutes later. I texted him asking if he had made a mistake and if he wanted something from me (I was being nice and friendly) but he said no forget that he followed me and all I said was okay if you say so and left it as that. by the way I DONT think it was a mistake since he would have to type in my username and press follow.

What is he thinking? Why did he follow me out of the blue? Is he starting to doubt his decision? Why would a man do this?
Is he regretting his decision?
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