Relationship expert Li Yinhe says:

"Any man and woman, as long as they are of the opposite sex, and spend enough time together, they will inevitably develop feelings."
As for what kind of feelings, there is no language that can clearly express that kind of emotion.
No one should pretend to be pure and say it's just pure friendship.
Therefore, proactively keeping distance from a friend's partner is a sign of maturity.
This paragraph is like a cold splash of water,
waking up countless people testing the boundaries of ambiguity.
The attraction between opposite sexes is engraved in our genes.
Two people chatting every day, eating alone, sharing secrets,
over time, how can there be no feelings?
That kind of feeling, hard to describe—
more than friends, less than lovers.
You call it "soulmate,"
"blue face," "bestie,"
they are just disguises for ambiguity.
Late at night, you vent to him about your partner, he comforts you,
at that moment, do you feel a trace of dependence?
He gets sick, you worry and send medicine,
at that moment, do you feel a twinge of tenderness beyond friendship?
Those "exceeding" parts are feelings.
Pure friendship? Not possible.
Many people argue: "We haven't done anything."
But know that feelings are not just about sex.
It's concern, dependence,
jealousy when you see him getting close to others,
worrying when he doesn't reply to messages.
These are all evidence of feelings.
You enjoy his care, crave his companionship,
even compare him to your partner—
at this point, your feelings have crossed the line.
Not sleeping together doesn't mean no infidelity.
Spiritual deviation is more hurtful than physical.
Proactively maintaining distance is adult dignity.
Mature people understand how to avoid suspicion proactively.
It's not about distrust in oneself, but about not giving misunderstandings a chance.
Not meeting alone,
not private chatting,
not discussing partner's privacy.
If you do these three things,
you are truly being honest with your friends,
and also with your conscience.
Don't challenge human nature with "we are innocent."
Putting two fires together,
and still saying they shouldn't burn,
is that possible?
Respect for human nature means staying away from the fire.
Don't test your desire with your own willpower,
you can't afford to lose.
True maturity is drawing a line proactively.
Beyond that line is the abyss of ambiguity.
Mature people,
draw the line far away in advance,
so they don't get close.
Don't meet a friend's partner alone,
don't complain about your partner to an opposite-sex friend,
don't discuss emotional topics with the opposite sex late at night,
don't compare your partner's flaws with your friend's strengths.
These lines may seem rigid,
but they are actually protecting everyone—
protecting your friend's family,
protecting your own innocence,
protecting the innocent who might get hurt.
In the adult world,
it's not that there are no temptations,
but that we actively stay away from them.
The best relationship with a friend's partner is—
knowing but not close;
respectful but not intimate;
when you need help, ask a friend,
not their partner.
Maintaining distance,
is not indifference,
but the greatest kindness.
The end of ambiguity,
is not love,
but disaster.