is it ok to be jealous????

You can't really help being jealous, it's not something that is very easy to control. There's nothing wrong with being jealous as long as you don't do something wrong because of your jealousy.

It's the human nature after all.

I'm not exactly sure how to answer this.... It is okay, but it's better not to be. As long as you can deal with your feelings, you should be fine.