Should I stop talking to my sister?

My older sister and I have never really gotten along. When we were kids she was really mean to me and a very angry person. I never understood it but I always knew it was because our mother left us and our dad remarried. Most of the time she directed her hate towards me. I never understood it because I was almost 5 years younger than her. Although, I was not an angel and would say mean things back to her when she picked on me, I was hurt that she could treat me like pure crap. Then to everyone else she acted sweet and loving including our step-mom and half brother's and sister's. She made it look like I was the devil that always started things when it was actually the other way around. Now that we're older I've started to go through some of the the same feelings of betrayal and anger towards our family but she doesn't understand. She thinks I'm ungrateful and it's my own fault I'm unhappy and I deserve it. For example, I was engaged when I got pregnant and she voiced her disapproval about me not being married first. She said I was too young and I was wrong. She later told me she had an abortion around the same time and although I was shocked, I didn't criticize her or tell her that she was wrong. I just feel like she still treats me nasty when we talk on the phone and she really doesn't act interested. Sometimes she'll tell me she hasn't called because she "lost" my phone number (she's told me that several times). But I noticed that she had put my half brother's and half sister's cell numbers in her phone but not mine? We live in different states so we don't see each other much and I always make an effort to go visit her. But she makes no effort and when I do visit she treats me like crap and complains about how my son is out of control because he acted out in public and got embarred. Yet her daughter is an angel (not really) in her eyes. I also noticed she calls me when she's on break at work and is short with me and acts like she has no time to talk to me, yet she visits our family every week. It's like she respects those that have wronged her in the past (including our dad) more than the person that has never really done anything to her (me). My family even stopped talking to me because she over reacted about something my husband jokingly said to her husband. It was about a joke our father had said about her husband and I had once mentioned it to my husband. Did I know my husband would do something like that? No, but it wasn't a big deal and then next thing I know my dad kicks me out of the house because of that and because my sister was angry at me. My dad and my family didn't talk to me for 3 years but my sister called and said she wanted to stay in contact only for the sake of our children. I feel betrayed by her because she caused the tension between me and my dad but acts like she did nothing wrong and now wonders why I dislike him. She's more on their side, against me, than with me. I always wondered why it was that I couldn't be happy when she wasn't happy.I'm thinking maybe we shouldn't talk anymore because she's doesn't have time for me and calls me only when she feels guilty for not talkinig to me for awhile or she's really bored at work. And I'm getting tired of her calling me stupid or dumb when I tell her personal things. Really what should I do?