@ChadSims2
Thank you for your answer. :) I spend months (I bought The Sims 4 in June 2017) playing a single Sims - it was fun - but how many times you can go to discotheque, flirting with other Sim, first kiss, wh and done! I got some emotions, when he or she has meet two or three lovers at the same area... But when I got "player" trait (the reward for Romantic aspiration) I lost this too... That's all!
In The Sims I love to make romantic stories. I love pets, but in game I got one homeless kitten from asylum, I do not fishing or collecting treasures.
If you try very, very hard, you can make a good couple, but what's the point?
I've lost whole my free from work day to make a good couple - reset game and random changes in CAS many, many times, till I got a small hope, that I'm successful...
But what if you want to make two Sims from different areas and meet them in town? I've tried to split my "chemistry" couple by saved them and start whole new game, where they live in different houses. I got several games, and I was failed, when the guy answers negative for RQ to his own ex-wife (I was sure, that he liked her very much!). Maybe their inner "turns on" are resetting, when we starting a new game? That's cruel! :(