He stopped replying after we dated, but now he wants to follow me on Instagram?

We had been colleagues in our previous job. This summer we met again, we dated for a few weeks, everything seemed wonderful, then suddenly he stopped replying to text messages, although he read them. I didn't insist or pressured, I understood I was ghosted. But a couple of weeks later he sent me a follow request on Instagram. What should I do?

He stopped replying after we dated, but now he wants to follow me on Instagram?
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