Am i wrong for this?

So, my grandma came over for a visit. And i do care about her but...we’re not very close at all. And i mean AT ALL. Its mostly bcuz i never interacted with her when i was little and i frankly dont rememberher being in my childhood. So bcuz of this im always very uncomfortable around her. Bcuz i have to “pretend” (?) to be close with her bcuz she feels like she may know me and is closer to me than she may think. And to make matters even more awkward and uncomfortable for me, she comes into my room and just starts trying my clothes...............like.....what.....? Keep in mind, im already a VERY VERYYY private and awkward introvert, so having her do this sort of stuff that i would only let really close ppl to me do, when i rarely ever see her or talk to her in the first place just makes me annoyed? Im being a bitch about this small stuff and i hate this about myself honestly. Like damn. Whenever i see ppl close with their grandmas and stuff i just feel like i could do better and shit. Like why am i like this with my grandma? Haaaaaa anyways...thats my weekly tantrum.