Most Helpful Guy
I've dated a few single moms, and single parents like to wait a little longer before they get into things like introducing kids, or especially moving in.
Two college-age kids moving in together is whatever, but when you're dating a single parent moving in means you're becoming part of the family. Though in my opinion, 4 months is WAY too soon to be thinking about moving in. That's not something I'd think about until I was about a year into the relationship.
Just bear with him and realize that as a single dad, he's going to be protective of his kids. That means it'll take time and he'll have to decide he really likes and trusts you as a potential "future mom" for his kids before he has you meet them. And moving in? A single parent wanting to move in pretty much says they're either hard up financially, or think marrying you is a strong possibility. Most single parents don't f*** around when it comes to that stuff.