Questions for your boyfriend, things to consider
First try to understand her, and then ask relative questions to support her feelings. It is also good to ask her about yourself and how she looks you in her life. You can also present some hypothetical scenarios, and ask her how would she feel if you react to some situations in a certain way, and if sometimes you don't have enough money to make both ends meet?. This will reflect if she is materialistic or really loves you. It is good to know about her friends to determine her liking and disliking.