My boyfriend says he has to be a priest, even though he wants to be with me. Could he be wrong?

My boyfriend and I have been together for almost two years. I have realized that I want a simple life. I want to get married and serve god with my boyfriend, but he says he has to be a priest. Is there any way he could be wrong? God keeps showing me signs that he is, and I don't know what to do. I'm only fifteen, but I know he is my soul mate. God has told me. I am to convert to catholicism and marry him, but my boyfriend won't believe me. please help.