What does this mean ? "I have walked among the desperate, rejected, and angry young men, I have told them that Molotov cocktails and rifles woulld not solve their problems.

We can look at clues in the excerpt to solve our problem. The first hint is "desperate, rejected, and angry young men". This part says that the narrator has seen many people who were overshadowed by society and stuck to themselves. Molotov cocktail and rifles are usually associated with violence, so that would be my best guess. My final thought is that the author is trying to say that young men who has been labelled an outcast have turned to violence, as they think it is their only option.

in june, we will have been married for eighteen months. (i am assuming this is what you want? the sentence, as you have presented it, is grammatically incorrect--   you want it corrected, yes? )