Should I or Shouldn't I?

Okay...need some advice. Backstory: I met a guy my freshman year of college. We started dating and I became pregnant after a few months. I moved home and he moved on... He met his child once as a baby, and then I never heard from him again. That was 19 years ago. Now, years later, he is e-mailing me. We have worked through a lot of issues from the past. He claims that he loves me and wants a relationship with me and his child. I am single and have never married. He is 2x divorced, and just moved out of his current girlfriends home. He has 2 more kids, one by a wife and one by the girlfriend. I have strong feelings for him, but my daughter doesn't know we have e-mailed. I was waiting for her to ask about him. I don't want her to have to deal with any emotional baggage she isn't ready for. So...my questions. 1) Do I tell her that he and I are in contact and he wants a relationship with me and her? 2) Do I trust him and try a relationship after 19 years? I think I could love him again...but I just don't know...