9. He’s acting out of character:
You know his daily routine inside and out, and any variation is enough to give you pause. If he’s super-insistent that you guys do something you never do (like take a walk through a park or drive to a place to watch the sunset), he may be setting you up to speak those four little words: “Will you marry me?” After all that hard work, be sure to make it easy on him and say yes!