What do I do if my ex wants me back?

So i dated this guy for almost 4 months and it's been also almost 4 months since we broke up

He texted me twice after our broke up saying he wants me back but I refused

And now he's deleting all our arguments and leaving all the sweet messages he used to send me (literally stalking me)

What should I do if he texts me again?
Pls help
What do I do if my ex wants me back?
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