Перевод не художественный
On a quiet night, the moon beam in the water trembles slightly
Behind the aul, in silence, the river rumbles over the stones,
The leaves of the sleepy forests talk to each other,
The ground is covered with dark greenery.
The mountains muffle distant rumble, a shepherd's shout in silence,
Behind the aul, you would come on a date with me...
[you] being fearless and meek and beautiful as a child,
Having come running from afar, breathing with difficulty,
Words were unnecessary, I remember the fast heartbeat
The moment you suddenly pressed your lips against mine.
The mountains muffle distant rumble, a shepherd's shout in silence,
Behind the aul, you would come on a date with me...
2. Happy (счастливый, в данном контексте счастливы)
fastly и happily:
1) наречия (нам же нужны прилагательные)
2) не подходят по смыслу к данным предложениям (даже звучит кривовато )