Is he the right one?

I am dating this guy, he's good.. It's just been 3 days since we're dating.. We're getting to know each other but we've had crush on each other for more than a month.. He told me that he cheated on his ex when he was 15, but he regrets it now.. He even brought up the topic of his childhood love and told that she's the only woman he's ever loved ans they met a few days ago, and he wanted her back but he got to know that she's getting married against her will.. They continue to remain in a platonic relationship.. I am somewhat not okay with this.. Should I confront him, is he a red flag?

Is he the right one?
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