I read your full story about the couple preaching the gospel to you. It sound like you handled it well.
When I was new to the Dhamma, in my zeal, I erred on the side of talking about it too much, sometimes leaving my friends with glazed over eyes. I’ve learned to let my life and actions speak for themselves. I have had situations where friends are entrenched in troubling or difficult life situations and I’ve offered basic insights such as perception and misperception, the nature of grasping and aversion, sitting with unpleasantness, impermanence and such. I make no secret of the power of regular, daily meditation in my life and the penetrating wisdom of the Buddha. But all of that would be quite distinct from proselytizing and it isn’t something I look for any excuse to bring up.
In this vein, I’ve noticed that most everyone I’ve met who mentions the Buddha or Buddhism doesn’t have even a rudimentary conception of the Buddha or what he accomplished and taught. Most people in the US think the Buddha was a fat guru teaching OM chants and bliss and being one with the cosmos.