Hey popi, I know this must be very difficult for you but I think it can be very helpful for you if feel the common humanity that everybody, and also you and your sister, share. Life is hard and sometimes it brings about nasty behaviours in people. But that doesn’t make them inherently bad or undeserving of love. I think if you can realize that your sister deserves kind treatment and good things in her life, it will be easier for you to deal with her and with your own pain. Don’t take what she’s doing personal. Keep your distance, be assertive (and it seems this can be done by clarifying things and then ignoring her if she continues) and don’t hate her for being so lost.

Anyway, I am glad to hear that she seems to have backed off for the past two days and I wish you that it stays like this. If not, I hope the tips everybody gave will be useful for you. And like you say, it’s also good to focus your energy on yourself, for instance on exercising if that’s what you love doing :).

All the best.