What should i txt him?

Okay there is this guy I like nd his girlfriend barley broke up wit him I know he problem wants some space but every time he's in a brake up 6 hours later he already has another girlfriend and before he starts looking I want to get him interested nd I want ways to get his attention nd I need advice!!! Im txting him and idk if he's interested please help me before he finds another girl. How should start the conversation and keep it going. Our bond is like we know each other for a long time but we just connect on fb or text message.