Low-self esteem?

wanna know the meaning of low-self esteem?:)
then read this:

"I feel like I'm carrying the weight of the world on my shoulders,
there is no point in doing something if i can't do it well,
failing partially is like failing completely,
i always try my best to please others,
but i always disappoint the ppl who care about me,
i find it hard to forgive myself when i make a mistake,
my glass is always half-empty, not half full..
i feel that i'm a drag to you,
but am i?.."

sound like anyone of you?=P
haha i hope not:)
nowadays will get quite irritated if the person i'm messaging takes super long to reply..unless they got their reasons:)
haha..so if can reply me ASAP if you can haha:)

buai~