Is it normal for those who cheated and left to come back again?

My ex cheated and eventually broke it off with me. He then got together with the girl he cheated on me with. 3 years later, he contacted me again. He was sweet and nice, was even flirty with me. He took me out on a couple of dates, nothing physical ever happened, not even a hug but he was always sweet in his texts (calling me babe, honey and stuff). I asked about his relationship with the girl and he said he’s very happy with her. So why would he be all lovely and sweet to me then after all these years? Is this normal?

Updates
5 mo
Okay he officially ghosted me. It’s been almost a month since he last left me on read and ignored my calls. Seemed like he was acting all nice and sweet to me just so he could get all his stuff back and to get access to my business partners lol
Is it normal for those who cheated and left to come back again?
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