Could a Computer Behave as a Person?

In certain respects, possibly all, a computer could behave as a person. It couldn't be a person though. The human mind may have developed because of need. But perhaps also because of desire to continue to live, individually and collectively. Could a computer have such a desire? Maybe (think of HAL in 2001: A Space Odyssey). But consciousness would be essential to a desire for survival and I don't think self-consciousness is programmable.

And even if a computer could behave like a person, it couldn't be a person as there is more to a human than determinate programmable input can create. How can we program in the ability to love, for instance? We can't even define it.