Right, I have decided I need to go really low contact with my half sister. As in, I need to see her the absolute bare minimum without totally destroying my relationship with my dad. My reason is quite simple - she really doesn't like me and barely covers her dislike. I'm sick of going round to dads never knowing whether she will be civil or just downright rude. She lives with dad and step-mum so I can't just go round when she isn't there.
I've never totally figured out why she doesn't like me, but I think it's jealousy. My life isn't awesome (I'm happy but not particularly high achieving) but she is jealous of my relationship with my half brother (her full brother). Me and DBro get on pretty well and he comes to mine about once a fortnight to catch up. DBro and half sister don't get on well, but I generally don't get involved. When he's obviously being an arse I do tell him so, but mostly I keep out of it. However, she has described him coming round as "weird". I don't know what she means by that but I honestly don't think there's anything remotely out of the ordinary by a brother and sister being friends.
If I listed the behaviour each individual thing sounds so petty, but it is never ending. When she was young I could forgive it as teenage dramas, but she's 22 now and I just can't be doing with it any more - I feel like it's time to say "enough is enough". So I'm planning on telling dad that I won't really be round there anymore because I can't deal with the passive aggressive nonsense but he's welcome at mine anytime he wants.
For total honesty (and to avoid drip feeding) she has anxiety, and so do I - tho I only told them about mine (including suicide plans) 2 years ago so I can't blame them for not being considerate of my mental health before that. However, IMO dad has never treated me or my full DSis equal to our half siblings, but I can let that go because I want to maintain some kind of relationship with my dad.
If you got this far, thanks for reading! And any advice on how to broach the subject would be really helpful. I'm really nervous.