There is a kind of self-reliance that goes beyond healthy independence. It is the deep, automatic conviction that the only person you can truly count on is yourself, that everyone else is, at best, a pleasant bonus and, at worst, a disappointment waiting to happen. If that describes you, it is worth understanding that this was not a personality you were born with. It was a solution you built, and it was a smart one.
Self-reliance as an adaptation
Human children are wired to depend on caregivers; that is the natural design. When depending works, when reaching out reliably brings comfort, a child develops what attachment researchers call secure attachment, an underlying confidence that others can be counted on (Ainsworth et al., 1978). When depending does not work, the child adapts.
One common adaptation is to deactivate the need itself. Attachment researchers Mario Mikulincer and Phillip Shaver describe deactivating strategies, in which a person who learned that turning to others brings rejection or disappointment minimizes their attachment needs, suppresses vulnerability, and relies compulsively on themselves (Mikulincer & Shaver, 2007). If no one is reliably there, the safest move is to need no one. So you became your own most reliable person.
Why it was the right call
It is important to see the intelligence in this. A child cannot change an unreliable environment. What they can do is adjust their own strategy, and becoming self-sufficient is a genuinely effective one. It reduces the pain of unmet needs, it builds real competence, and it creates a sense of control in a situation that offered little. John Bowlby called the extreme version compulsive self-reliance, and noted it develops precisely in those who learned that depending on others was not safe (Bowlby, 1980). You did not fail to trust. You learned not to, for good reasons.
What the solution becomes
The difficulty is that adaptations outlive the conditions that created them. The self-reliance that protected you as a child does not switch off when you reach an adulthood where, perhaps, some people actually are reliable. It keeps running, treating every relationship as if dependence were still dangerous. The strength becomes a wall.
So you may find yourself unable to ask even when asking would help, unable to rest because resting means trusting someone else to hold things, and quietly lonely inside your own competence, the one who carries everyone and is carried by no one.
Holding it differently
None of this means abandoning your self-reliance, which is a real and valuable strength. It means recognizing it as a strategy rather than a fixed truth, and beginning to test, carefully, whether the old rule still holds. Some people, now, can be counted on. Letting one or two of them prove it, in small ways, is how the wall slowly becomes a door you can choose to open.
You became your own most reliable person because, once, you had to be. That capability is yours to keep. The hopeful part is that being able to rely on yourself and being able to rely on others are not opposites. The fullest version of you gets to do both.
References
Mikulincer, M., & Shaver, P. R. (2007). Attachment in Adulthood: Structure, Dynamics, and Change. Guilford Press.
Bowlby, J. (1980). Attachment and Loss, Vol. 3: Loss, Sadness and Depression. Basic Books.