I recently started seeing a guy with a young son, 3 years old. I really like him and I think he feels the same. I've never been with a single father before but it doesn't bother me, I'm sure I'll love his kid. We are taking it slow (for obvious reasons) but before I get in too deep, I have this lingering fear that him and his ex will get back together. They were together for four years and broke up six months ago. He said they are still friends and broke up because they were arguing and fighting a lot when they had their son. I guess my concern is that because there was no dramatic event that happened (cheating etc) and the fact that they have a child together, they will always be close. I mean they share a bond that him and I are never going to have. I feel like once I enter the picture officially, she might get jealous and want him back and for his child's sake, he might go for it. Am I being paranoid or is this a legitimate concern?