The founder of every strong relationship is communication. If u like something in somebody don't hesitate just say it . If u don't appreciate something in someone's behaviour definitely convey them
And if you are wondering about how others will feel when you say bad about them and what if they leave you?
Well remember this love ;
A person who actually loves u will never put themselves in a position to lose you. They won't feel gloomy if u point them out rather they'll be glad enough to try to be perfect for you . I don't promise that they'll change but definitely they'll try to Atleast onceEverytime u keep your emotions to yourself they'll pile up and jumble and slowly without your consciousness intervening you'll start feeling hatred towards the person you adore. On the other side of story your special half will start taking you for granted cause you always failed to explain yourself.
Everytime you forgive a person without making them realise the hatred accumulates . They also don't care to improve so soon even if they love you you'll have null feelings for them.
Be verbose. Start expressing before the relations which mean the most to you sound like they've reached a stage where you longer care