Is it difficult to be generous when you know you don't really want to share?
plz answer me plz plz

I mean it depends on the situation, like if I brought like the newest iPhone to school and everyone wanted to have their grubby hands on it I wouldn't give it to them unless they were friends. Another situation like you have a bag of Doritos and everyone wants one, sure you can spare one but don't give them the whole bag.

Yes, it can always be difficult in some way. It also depends on the situation and what type of person you are. If you are shy or reserved, it will be hard for you to resist the peer pressure to share something. If you aren't, generally you will speak your mind and approach what you actually think about sharing. Also, it is very important who is asking for you to share something. If you aren't able to speak your desires or what you think to that person or people, then you probably shouldn't be around them or even consider sharing with them.