Should I break up with him?

My boyfriend lives in other state, We meet though an chat appl and we are now together. Since the beginning I knew he had 2 kids but they and their mother lives in other country and next year he has plans to go and visit them. But I'm scared because maybe will prefer to say with then, is been 6 years that he lives here in USA and we are just 6 months together. We been planning to move together but I don't know what to do ???