Utilize wisdom about the world and insight into your own nature to be able to honestly decide if you want to know the answer. Do you want to shift your status from suspicious to informed?
You must act upon what you know. Keep in mind that inaction is action.
Are you prepared to do something with the knowledge? If not, don’t ask, and the other person can keep right on not telling. Enjoy the status quo of active inaction. When you’re ready and capable of initiating and following through with change only then seek enlightenment by asking your question. Don’t prematurely shake up your life by demanding the truth right now, dammit!