If you keep making him prove his love for you by doing certain things, that is not love. It’s a dysfunctional partnership.
Nobody appreciates being blackmailed into doing something. He clearly loves you.
But don’t make him do something to prove that. That is a childish thing to do and your partner won’t stand for it.
You wouldn’t like having to prove your love for him by doing this and that, so don’t make him go through the same thing; it’s as simple as that.