Only he can answer that question. Once a couple start living together, there is no urgency to get married. You are acting married without any legal ramifications. Whether or not it is a good idea for you to get engaged or married depends on many factors including how old you are and your financial situation. If you think your are read, then you have to stop acting like a child and "confront' him. As much as you've bough into the romance of a surprise, the reality is that getting engaged shouldn't be a surprise. You two need to talk in detail about your goals and values and agree that you are confident that you are prepared for the legal, financial, moral, and emotional responsibilities.