Musings on choices, fate, and death

Do our decisions affect others or just how they affect us? Or do our decisions lead to, or avoid collisions of fate, or do we collide anyway but our decisions just change the impact the intertwined fate has on our lives?
Do we even have a choice, and if we do, could we change fate by making different choices? How would knowing the full outcome change the decisions we make? Do we perhaps make decisions too hastily without thinking of all the repercussions? Yes, fate, decisions, and future outcomes are like an intricate chess game, but are we too impatient when making decisions? Did we go from making wise decisions after careful deliberation, to a game of speed chess where we rely on instinct? Would we be more effective in making a positive future with positive outcomes if we pause, meditate, and deeply consider our decisions have on our futures and the future of others?
Or do we just delay the inevitable fate we all face, or perhaps just play into the hands of destiny?
Would things have been different if other decisions were made? If you reach out and get to know someone (as opposed to making the opposite decision), would they have been with you and have done something different at the time when they should have died; by making that decision to get to know them, you would have changed the outcome? Or is the line drawn and their death imminent, and your original decision only means that they are no longer a stranger and that you will now be mourning their death?