Feelings and Brain

i'd like to talk about this such thing above the human body,
human brain , really there are such strange matters in this organ, and feelings as well
there are usually contrasted ,
why always when we loose some thing , we regret after that , why when we find some one who love us so or want to be close to us , always trying to neglect him , and after moments of his disappeared, we feel bad regret and wishing to make him back again.

so , we always do this...... , why we cant trying to keep people close to us special when we find people love us truly and honestly, why we become adore living alone without passion in our life
all our life time we looking for love and passion and complain that we cant find true one
although if we just think and look around ,we'll find them looking to us with a beautiful smile on their faces
but the same end we discovered them too late after all the beautiful things had gone and
tha final we got those things
sad , pain , bad feelings , loneliness