Why does he want me back?

I am 27 and my ex (26) who is also the father of our 9 year old daughter wants to be a family again and wants to make things work with me. We haven't been together in 8 years. I just don't understand why now he chooses to make things work. He said he has never loved anyone the way he has love for me. Can someone give me their input? We were each others first for everything and we're together for four years in our teen years.

Why does he want me back?
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