Some people say that there is no pure relationship between men and women in this world. At first glance, the sentence
has some truth. If it weren't for some special feelings, why did you become friends and why did you get so close? But, think about it from another perspective, if the relationship between friends of the opposite sex in this world is unclear, then wouldn’t this world be in chaos long ago?
The relationship between people and the interaction between men and women are indeed very complicated, but it is not that chaotic.
Most of the time, two people will cross the line, often because you have done too many things that you cannot do or should not do. "Housing with good people is like entering a room of orchids. If you don't smell the fragrance for a long time, you will transform with it. If you don't live with bad people, you will transform with it. If you don't live with bad people, you will transform with it." The reason why the relationship between men and women changes is often because you don't pay attention to preventing the slightest slightest.
In fact, these three signs often occur before friends of the opposite sex cross the line. Do you have any between you?

Limb contact is becoming more and more frequent and more intimate
When you get along with the opposite sex, if you want to ensure the purity of the relationship, you must not ignore the physical distance. If any two people have frequent contact, especially those that can only be found between lovers, then the feelings will change sooner or later.
Just think about it, holding hands, hugging, and even further intimate links that only lovers can have, you can do the same, so how can you be pure?
In fact, in real life, one of the most frequent signs of friends of the opposite sex before crossing the line is that your physical contact is becoming more and more frequent and more intimate.
Under such premise, whenever there is a suitable environment and atmosphere, and a suitable mood, from holding hands to hugging to kissing and then crossing the line, it is often very likely that it will only happen in a moment.

not only does not deny it, but instead defaults to the outside world rumor
rumor stops at the wise. However, many people in real life don’t care whether it is a rumor or not. As long as it sounds credible and as long as they can add a little topic of talk to them after dinner, that is enough.
As the party involved or the core of the rumors, the most important thing to do is to explain it clearly in a timely manner and prevent the rumors from escalating. Especially when the relationship between men and women is talked about too many people, even if it doesn’t come true, it will definitely damage your reputation.
In fact, one of the important reasons why many friends of the opposite sex cross the line is that they do not explain, not only do not deny it, but instead default to external rumors. In the long run, not only will others take it seriously, but you will also take it for granted. That may be true.
Once there is such a sign, the distance between you will definitely not be too far away.

often stay together privately
As friends of the opposite sex, what you fear most is not whether you have a good impression of the other party, but whether you have face-to-face opportunities.
The feelings under the day are all discussed. Even if you really get excited when you first meet, it's no big deal. As long as you may never have any intersection in the later stories, you may not even have the chance to face each other, and then the so-called heartbeat will only be like a flash in the pan.
So if friends of the opposite sex often stay together privately and want this kind of space to be alone, if there is such a sign, it will be not far from crossing the boundary.
You should know that whenever there is too much tacit understanding between men and women, everything is actually quietly changing.