Men lose interest when a woman does one of these things ...

Business-based relationship
If you are in a relationship where, besides more shared feelings and responsibilities (money, children, home, business), it is necessary to discuss certain topics. You are business partners, but you need to know when to talk about business and when you simply enjoy the presence of each other.
It's hard to be passionately in love with a person who always talks about big, serious and very important things. Find time for fun and games to create a balance in your relationship.

He sees you more like a mother and less like a mistress
There are some men who have been taught that some women are mothers, and some are mistresses. It is very difficult for them to see both in the same being. Remember, you are not your mother - but the beloved woman.

You are the face of bad news
This time is over. It happens at the subconscious level. If every time you see your partner, you have bad news, he starts to associate you with bad news. It's correct? No, but it's a problem that can kill the enthusiasm of your relationship. It is difficult to prevent the transfer of unpleasant information, but even more important is to take the necessary steps not to become a mess of bad news.

He stops feeling your admiration
For some reasons, the idea that a woman can admire her husband is foreign to women. But this is important to attract him. The man who feels he does not deserve your admiration gradually begins to lose interest in that relationship.

One word: incompatibility
As time passes you know your partner better. All the differences between you become more visible and most of the time one or the other partner leaves your hands down and says, "I'm not interested in this relationship anymore."