OMFG!!!! Im soooo frustrated!!!!?

My older sister (she's 17) has told me (I'm 14) like 5 times today that she wants to have some "sister time" with me. The first four times, she ended up dragging me over to whever her bf was and I was completely ignored or talked about like I wasn't even there. Then just about an hour ago, I was about to go out with some friends and she goes, "Awww! I was wantin you to go to my choir practice then hang out with me afterwards!" so i canceled my plans and just a few minutes ago, she came up to me and goes, "You know, I think I'm just gonna drop you off at someone's house on my way to choir practice, ok?" UGH!!!! I'm so frustrated with her! She does this all the time! What do I do? (Besides never believing or listening to her again)