Abed's whacky family Christmas. (Advice needed)

So, Christmas for many of us here can be an odd time. What with a variety of issues with family, the lack of a social life and of course the forced interaction that usually leaves us feeling like Abed and that is exactly what I got this year. Anyway, after one of the various fights I was told by my sister that I was 'Scary', for the last two years I've been trying to reconnect with her. We never had a fight in those two years and I spent the majority of that time trying to engage, anyway, she just flat out told me that I scare her and all of her friends feel the same way, when pressed on the issue she listed every issue she has with me...I decided to remain silent, I didn't want to bring her down. Now for the past couple of days, I can't interact with people (though I was hardly doing this to begin with) and further shut down emotionally. I suppose my main issue is that I've been trying my best to form a bond, whilst she's been gossiping.

Oh, and I should mention that she is a 'Tumblr' girl for any insight into how reforging after trying this for two years is going to be pointless.

Has anybody else been put in this position? How do you deal with it? What's the best course of action? When you put so much work into something, is it okay just to let it go?