Clingy older sis- please help!

My sister is sensitive. She is a year older than me but we are in our late 20’s. She is always willing to do anything and everything I want to do (i.e I chose the movie, restaurant etc) and even if she hates it, she will pretend she doesnt, just to spend time with me. I am the opposite- i am very straightforward if i’m not in the mood for a particular activity. But she resents me because she expects me to be just as unconditional about spending time with her. I feel extremely guilty but I think her approach to our relationship is unhealthy and unfair to me. What do you ladies think? How do i handle this without ruining our relationship?!