Maybe you find it as an amusing thing. To show that you're really sincere to someone who won't believe you in the first place and then left them. You've tried hard to earn the trust. But when they finally believe you after so long, you just walked away, as if nothing had happened. As if you've never demanded the trust. As if you really meant your effort as sth useless, or maybe you're just PRETENDING to earn the trust. If that the case, may Allah bless you with happiness so that you'll live long enough to finally realize how stupid and wasteful the act that you've done.
Well, expectation often leads to frustration.