Here is the full list of all 45 Amorous achievements. It takes around 8-10 hours to unlock all of the achievements on Windows.
Finished the third date with Dustin.
Finished the second date with Dustin.
Finished the first date with Dustin.
Got Dustin's phone number.
Finished the third date with Jax.
Finished the second date with Jax.
Finished the first date with Jax.
Got Jax's phone number.
Finished the third date with Seth.
Finished the second date with Seth.
Finished the first date with Seth.
Finished the third date with Remy.
Finished the second date with Remy.
Cooked a perfect meal.
Finished the first date with Remy.
Got Remy's phone number.
Finished the third date with Mercy.
Finished the second date with Mercy.
Finished the first date with Mercy.
Got Mercy's phone number.
Requested a song at Club Amorous.
Finished the third date with Lex.
Finished the second date with Lex.
Finished the first date with Lex.
Got Lex's phone number.
Finished the third date with Skye.
Finished the second date with Skye.
Listened to what Coby had to say.
Changed clothes to impress your dates.
Finished the first date with Skye.
Got Coby's phone number.
Got Seth's phone number.
Got Skye's phone number.
Finished the prologue.
Entered Club Amorous for the first time.
Checked your phone for the first time.
Customized your Fursona.
Got Zenith's phone number.
Finished the first date with Zenith.
Finished the second date with Zenith.
Finished the third date with Zenith.
Scored more than 2500 points at the Shooting Range in one round.
Made more than 60 headshots at the Shooting Range in one round.
Didn't miss any shots at the Shooting Range in one round.
Missed less than 30 targets at the Shooting Range in one round.