She is a good coworker, meaning she knows her duties and has ample experience.
She is also a gossip and a person that will rant when somebody doesn’t greet her the way she believes she deserves to be greeted, or about how a coworker or manager wasn’t friendly to her. It’s both what she says and how she says it, like she was hurt.
I still don’t know if what she wants is that everyone stops doing their jobs when she enters the workplace to give her attention, because otherwise, apparently, people hate her. She is also very pretty. Not that I’d want a relationship with her, because this trait is very off putting.
I’ve already heard her saying I’m not friendly and I don’t know who should I react. I think it’s ridiculous to start giving her attention to keep the peace because I have things to do that pay my bills and it would be very draining, I cannot fake interest in things that bore me. I don’t understand why we can’t just do our jobs and go home.
Your coworker is immature. How much of it you have to put up with depends entirely on your job. Do you share an office? Work on projects together? In that case, you might look into some non-judgemental responses. For example, if she starts gossiping you could ask to change the subject or even tell her it makes you uncomfortable.
If she’s on the other side of the office in another department, ignore and move on. There’s a certain amount of maturity required to deal with people who are less mature than yourself, and it can be difficult sometimes.