i dont understand these days

i dont understand the things that goes around me....
one day i hate a girl so much that i decide i will never ever talk to her, and the next day, i am arranging a surprise birthday party for her.
one day i am telling everybody, i have no crush on so and so, next day, i am ringing her door on every pretext, and her thoughts haunt for another few days...
one day i decide i will help not help somebody, next day i leave my job to sit and help for that person leaving the job i have at hand. the persons i used to hate, now i love them. person's whom i used to love, i hate them. persons i thought are very caring and understanding, are not so. the person i thought were cold hearted, seem to have a genuine caring heart.
nothing that seems is what they seem to be. everything is an illusion, my philosophy is reinforced.
i try not to interpret people. i try not to understand them. but i keep thinking abt them.
if people are good or if people are bad, why should it bother me.....
if i love them....i should love them..,.wther they are good or bad...then why do i so often complicate my thinking...
is it because i am still a humanbeing