Johnny,
-I can only pity them inside my heart, thinking “I could have helped you.” –
Dhamma is not only the greatest gift, it is also the one most difficult to give. You will learn that in nearly all cases it will be wasted effort. You can tell by the look in their eyes when people are not interested. How can they be? A two-year-old’s eyes will light up on seeing a colourful toy not the cover of a book. They are just not ready for it.
Send out ‘feelers’ whenever the urge to talk about Dhamma arises in you, or when a conversation is taking place where It would fit in as a follow-up. Since coming across Dhamma myself,in 20 months I have made reference to It with only a handful of people, seven or so at most, and only once did I get the feeling that the other was listening -but this one, a teenager, happened to be already into Zen, so there was a basis for at least making reference to the Buddha’s original Teaching and to instil the urge in him to look into That for comparison, all the while taking great care not to force anything on him, judging, condemning, in the way of ‘this is the true Buddhism, that is the wrong one’. He will come to that realization himself, and even then, if and when he is ready for it.
You may pity them, but even that is wasted. Just radiate Metta to them as well, as you do with all other beings. Do not exclude them. Still, in real terms they are receiving nothing. The value and benefits of Metta are to yourself alone. So there can be no end to this pity. The practical thing to do is to share merits with everyone without exception.