A tall task is something difficult of accomplishment, if not entirely impossible.
It means you can't have the action and not have its consequences as well.
I am boring, really means I make other people feel bored. May be I don't talk much or do not have any interesting topics to explore.
When you get a crush on someone, your emotions are intense, powerful and crazy....but it doesn't last for long.
The big-headed person tends to think himself as better, smarter and more important than he really is.
Gotcha is the shortened form of ‘ I got you.’ This also means ‘ I understand you.’