Every time me and my sister make some sort of conversation, she always makes some type of sarcastic remark. For example last night I pulled out this book and flipped to a page where you choose a number and it tells you something, I asked her to pick a number and she did. After I was done reading it she said "Wow." Most times it more sarcastic or mean. She says "That's why nobody likes you!" Or "That's why you have no REAL friends." I'm pretty introverted so I don't have many friends, I have 5ish friends who I don't talk to a lot or at all. Either way it hurts because she says it constantly and it's eating away at me. She know I hate these sarcastic remarks and I told her directly and she said okay and the conversation changed. Sometimes when we swim in the backyard and I jump in she screams "WHALE!!" and starts laughing with my brother. I'm going to talk to my dad about the gym but she know I'm already extremely insecure and I think she's just being a bitch.