well dont listen to whoevevr said that they are the ones who are rude.well the first thing you should do is just talk to them...find something that you guys have in common and then see how it goes on...
Yes. I would know from experience. It may be frustrating sometimes when you want to hang out with them and so does your sister, but then you can all hang out together. You can just both have the same...
well theres nothing wrong with loving your best friends sister...i mean its natural....just go for it man..what can possibly stop you...your best friend??? is he going to decide wether you love his...