A truly mature person will gradually understand: a sense of security has never been given by others, but is something you live out yourself.

Marriage can change, feelings can change, people can change, and no relationship can guarantee to last forever.
What truly causes pain is not the end of a relationship, but our constant illusion that "I will never lose."
So instead of desperately controlling, doubting, checking phones, or fearing abandonment, it's better to develop your ability to face risks in advance:
Having the confidence to live independently, the capacity to handle changes, and the courage to start over at any time.
Because people can never truly possess anyone; all encounters are just temporary companionships, from strangers to closeness, then from closeness to separation—this is the normal course of life.
The so-called sense of security is not about finding someone who will never leave you, but about being able to hold yourself even if one day you lose, change, or part ways.
Truly strong people do not deny their insecurities, but acknowledge life's impermanence and still love sincerely, live calmly, and shift their focus from "fear of losing" to "growing myself."
When someone begins to believe: I am worthy of love, I can protect myself, and my life will not collapse because of anyone's departure,
that stable, relaxed, and clear-headed strength is the true sense of security.