to not compromise...to be obtuse?

So when two people meet and there be an attraction, what is it the makes them gel? Is it that strong physical pull, a lust illogical. Be it mannerisms and idiosyncrasies. A friendship and understanding a familiarity. Something on the intellectual front.
And if that initial attraction lasts longer than a month or two and one starts classifying that interaction as a relationship, why is it with time compromises need to be made. A need to address certain characteristics and modify them to that growing relationship.
Of course, one understands one needs to be progressive in ones personal growth for ones life does move on and new responsibilities and duties come with such a progression.
But.
Does that mean those mannerisms and idiosyncrasies that define the very person one is, should also change? Those that are part of one defining the very core of who one may be.
Whereas at one stage giggling coy or laughing robustly was so attractive, now grates the nerves. When wanting to be touchy touchy and feely feely was never enough yet, now is an invasion of personal space. When having heated debates was exactly that, a sharing of personal opinion and standing for what one believes in yet, now, is classified as being argumentative and wanting to be obtuse.
Does familiarity breed contempt.
Is boredom now defined by the very person that was the life of ones day, the reason for the smile on ones face.The challenge of the unknown past...all be less stimulating and thus the need to seek new pastures, new challenges, new debates even if argumentative.
Can one successfully compromise oneself to a point that it doesn't make one feel as if ones identity has been lost as well as that which knows to make one happy?
What is it that makes us become disinterested, less satisfied...lost.
Can the blame be placed on the other person...would that be fair?
And those long term relationships where people do manage to stay sweethearts eternal...should one be a skeptic and just say they settled for an adventure discovered, for others boring and mundane, the novelty worn off.
Yet, for them those silver grey hairs and the worn faces and body lived, still imbue a serene happiness lived and found...an adventure still travelled...compromises made...costing nothing more than appreciating and acknowledging the other as much as possible, the same way as the first day they met.
And thus the importance of being as original to self as possible...?
For one day it may catch up with one and then the dissatisfaction will set in and then posed the question...."is this what life is about?"

RB.