I'm not even going to be asking why you purposely ignore him and yet fantasize about children...or how someone you are ignoring got your hands on your diary...imo it sounds like a big set up to me....but I don't know the story.

Yes, yes, absolutely yes. You do not want to talk about babies and marriage with someone you are dating or just getting to know. If a guy I'm getting to know, or had just begun getting into a relationship with, I'd freak out if he starts talking about having kids or getting married. That's a huge red flag if he was absolutely serious about it. There's a fine line between, "What are your opinions on children and marriage" and "Let's start planning our future together with marriage and kids". Yes, it's important to know if your partner is interested in those things, but it's a scary thing to get serious with someone you're still getting to know