Swashbuckler 3rd level casting Greenflame Blade – does it work with Fancy Footwork?

If my Green-Flame Blade is Counterspelled, do I still get to make a normal melee attack

Does Spell Sniper feat grant 10 ft range to touch spells?

Does the extra attack allow you to cast Green Flame Blade and make the second attack?

Are Booming Blade and Green-Flame Blade compatible with extra attack?

Can you elect to not hit a second target with Geen Flame Blade even if one is in range?