He said that he had a girlfriend when he first met me and wanted a second chance now that he is officially single?

I was dating an old friend of mine. Everything was beautiful but He was a little on and off and I cut him off. He contacted me again after few weeks and said to me that the truth was that he had a girlfriend when he first met me and they were breaking up. he was separated from her now. he wanted to apologize and a second chance.
I'm just shocked. I liked him so much.. I don't know if I'm being too low if Im considering him. What i must do?

He said that he had a girlfriend when he first met me and wanted a second chance now that he is officially single?
Post Opinion