I have a younger 19 year old half sister on my dad's side of the family. I don't have much contact with my dad, we didn't speak for years and now we have very limited contact. Not being in contact with him meant not seeing my sister, I knew her untill she was about 3, I always felt bad for not staying in contact with her but the only way I could was through our dad. Last year I went to a family numbers wedding and she was also there. I wasn't even sure if she knew about me but she did. We stayed in touch after that and I found out she was living close by so we started meeting up regularly. She was very keen to have a relationship with me which I was glad about. It's just recently I've found it more difficult, she's a very intense person, that's the best way I could describe her. She's nice and we get on quite well most of the time it's just she's constantly got some sort of drama going on between her friends or her mum. She's turned up at my door a few times after arguments with her mum. The same thing happened the other week, it wasn't anything serious, I tried to help her see her mum's side of it but she was angry with me for not "taking her side". Called me up the next day like nothing happened then got angry again when I said she should apologise for shouting at me. She eventually called me again and said sorry. Are all 19 year olds like this? Have I just forgotten what it was like being a teenager?
There's also the problem that being contact with her means having that connection to my dad because he's very much still in her life. She regularly tells me I should speak to him more and I've explained that I don't want to speak to him anymore than I already do, that's the most contact I'll have. She seems to idolise him and I think she's just not seen what he's really like but maybe he's different with her.