NBA player Jason Collins’ one-time fiancée Carolyn Moos wants to milk his coming out for a book of her own. “I am in the process of making sense of my emotions and on a journey of healing . . . about the recent news,” Moos, who split with Collins in 2009, wrote in an e-mail to journalists, The Post’s Kirsten Fleming reports. “I will be writing a book and would like to reach out to you for quotes from pro athletes, coaches, relationships and topics include [sic] what it means to have a certain orientation and be a pro athlete . . . This will just be one chapter . . . but your input is highly appreciated.”