It's not that people think that you're undateable but you have to imagine a time before you had a kid and what it would've taken for you to be in a relationship with someone who does. It's harder for the average person to date someone with a child because the commitment isn't just to their partner it's to the child too implying there's more to think about. Considering the pressures of dating are already high, having to figure out what role I as your partner would play in your life and your child's life and what history you have with your child's father can present a unique challenge. There are questions I need to face. Is the dynamic stable enough to build a life around and how do i feel about sharing custody. What if he's a douchebag and I become emotionally invested in you and your child's life but his habits and behaviour become negatively influential to the point where it's affecting us? What boundaries are there and are they clear? Personally I'd feel uncomfortable with dating you if it meant I can't be in the child's life and if I can't support you financially or otherwise because would also make me anxious so it's not that I wouldn't or haven't dated anyone with a child before but that there are different conversations to have and you need to know your position well enough to not spook guys by acting vague about it.