Humans are still humans

When we know each others, we were strangers. Quickly we know each others thru conversation...
She was one who sat near me...we talk to each others thru lectures queries. Soon, we became closer...we make good friends...that I didn't foresee... eventually we become closer than friends....however, due to the differences of our nature, we were sometimes not in the same conclusion...as her nature was better with another, our difference become worse... I do feel that sometimes I were used...but helping others shouldn't think of that...but I just can't help but think that way... I feel that what some said is right...common courtesy should be there...I don't ask for something in return of what u do for ppl...but some common courtesy from them....