By Gemma Strong A woman has revealed that she has fallen in love with one of her friend’s dad after a secret 11 month relationship \- but she’s been warned about some major red flags. Age-gap romances often raise eyebrows. But this instance is all the more shocking given that the woman has known her partner since she was a child – they started dating less than a year ago, once she finished school. And while she is keen to go public with their relationship, he is holding back. Writing into the Metro’s sex column, the woman shared: “He has always wanted to keep our affair secret, but I feel read…