Why are girls like this?

Not all girls are like that. A girl would say that u will forget her when she is posessive about u

Not all girls are like that in the same manner that not all boys are like that. She could have a reason for doing so. You just have to ask her. It would give you a peace of mind to know the reason why .

First of all, you cannot generalize woman. We are also unique and not all girls are like that. Some girls can easily tell what they feel, some don't and want to let you hanging into nowhere. But on your part, you better approach and ask a person about it, so that you won't be left alone thinking and trying to figure out by yourself the question WHHYYYYY? It will just make you go nuts. If you love someone show it, say it and make it clear. If she replied back, you will know for sure. If she does not reply anything that will make it clear, then it will be two option, not interested or shy. If shy, you approach her and ask her about it so you will know better. Don't read between the lines too, that will be dangerous. Woman are really different when it comes to showing their emotions too, but we are more emotional than men.