Okay so, before me and my boyfriend actually got together, my sister liked him too. I asked her if she was okay with me and him getting together before I agreed to go out with him and she said she was more than okay with it and that we would be great together. Its been almost a year that me and him have been together and my sister has gotten really bitter over it. I'm not sorry got with him, but I am sorry she's so upset over it. Is there a way to fix this issue? Like, should I talk to her about it or let it pass?