Following on from our previous point about priorities, we thought we'd add another point in the same vain. Do you ever call your man and ask him to do you a favor when you just know it's so far out of his way or super inconvenient? You know he's in love if he immediately agrees and doesn't even mention the long list of other things he has to do that day.
Bear in mind that if he does go out of his way for you it should be without complaint. If he does it, but doesn't stop whining about it, it kind of defeats the point of doing something nice for you. If he accepts it and doesn't even have a hint of frustration in his tone of voice, you know he's 100 percent in love.