I'm a single mum and although it feels like you are gonna be sat around on the shelf gathering dust, think abut the positives HEllibobs. Without taking anything you can get, you are probably gonna get a few more first kisses before you find the one, and first kisses are all lush. A few more weird dates, and then someone is going to fall in love with you and your little'un.
Your neighbour sounds like a wally but maybe he genuinely likes you. As for the guy in the pub, he'd have done that whether you were a Mum or not.