Sounds to me Matt as if your sister is quite insecure and a little jealous for some reason. Might be because you're doing the things you like to do and are getting along fine. So basically, she has the problem not you! Try and let it wash over you as hard as this might be. I'd also give her a wide berth when you can. The old saying is true...you can choose your friends but not your relatives!.. don't let things get in the way of you getting well. You're doing ok. Myself and my brother had a relationship like yours. He's passed on now but we didn't see each other for 13 years once! Keep doing what you're doing and enjoy life...and the football match with your nephew.