What's going in, advice?

my ex is messaging me again, like he won't stop. he first wanted sex, but now he wants me back? he said it would be different and he said that he could put sex aside for a year and now he's like I will show me real love.

what do I do? I'm very hesitant. he said it wouldn't be like what it was before. he said he would prove it to me?
What's going in, advice?
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