Where were you when the enemy was push?
No...
/memes
There are 2 main gank paths, from the river and from the lane, from the lane you need to push so i can walk back unseen by minions, the river one is the old usual gank.
Popping flash is something worth as fuck, just because you want to immediately gratify your peeny-weeny with a kill doesn't mean it's not an objective to be satisfied with, this means i can gank later, there is less pressure so i can invade as he can't escape with flash, you keep him in lane, you force him to play passive and lose cs and allowing you to manipulate his wave.
Before opening your bronze/silver/gold/plat mouths, first learn the game, then talk.
Also this is REALLY misleading for other inexperienced players, please disregard.