What is better? 'I' or 'we'?
The biggest fear any identity-conscious individual would have is 'individuality crisis'. When people stop recognizing you for you and link you with someone. "Ah, you must be Mr. Sharma's son." "Oh! that is Sunita's husband." "Why don't you know he is Sodhi's partner?"
That one apostrophe followed by 's' changes the way the world looks at you.
While some people barely notice, the few who notice don't mind it at all. There are people who end up breaking ties because of being recognised as 'someone's something'. Individual perceptions again.
"I can't do this without you", you croon...
Ahem!! "Did you even try it alone?" Don't you think you are not giving yourself a fair chance to try something?
The person you back on may not be around always. Many husbands learn cooking in their wives' absence. Many sons take up family businesses after their dad's death. Even many more students work and learn and pay for their own education. There are many occasions in life when you have to stand for yourself, do things by yourself.
The day an individual realizes that even a shadow is lost after death and that we come alone and go alone, will he stop linking himself with others. But what is the point of individuality when your existence as an individual itself would be lost?
Be there for others (undoubtedly) but don't ignore yourself. Its not selfishness, it's justice to the unique life you have been granted.