Is this a redflag?

So my bf we talked about if we had a child and talked about names etc anyway he mention to me he had a past with the 1st love who got away. Who was forced into an arrange marriage even tho she wanted to be with him and he did as well. Anyways my bf says he wants to name his daughter her name "Haneen" his first love who got away but this was when he was 16 years old now he is 31. He said its the only girl he has truly loved but since then he hasn't been able to properly loved a girl. I mean after hearing all of this not sure if I should invest any of my time on him. He says he still thinks about her here and there but she already is married and has kids. So not sure if this is something I should be concerned about?