Me raven aka Zoe

Don't know what to do

So as u all know I have a sister that I have not seen in 12 years but now she is back in my life and I don't know if I am happy about it or not like look at it in my eyes the sister that I have not seen since I was like 4 or 5 is back in my life and is trying to be a real sister like I don't know if I want her in my life. We r seeing her on Sunday so this weekend yay not we r meeting her boyfriend as well but I can't have mine there like does that seem fair I think not I know I am going to cry when I see her because it's been so long it feels like I don't even have a sister but here she is coming back into my life I know I should be happy that she is back but I feel scared sad and well a bit happy but manly scared like what do I do I don't know what to say to her I don't know if I hug her or not I don't know what she expects for me to say or to do I don't even know what she looks like anymore. It's been so long and I hate this how she is just walking back into my life and she is also talking to my brother that she has no blood relation to at all but she won't talk to me like wtf but yea that's happening I will tell u guys what happens after but yea see ya.