Family issue.

This topic isn’t necessary a relationship issue but more of a family issue with a close cousin of mine. We’re two years apart and have spent so much time together over the course of our lives. She’s older than me and still close in age, so she’s always been “that favorite/closest cousin”. She’s had some hard times and I’ve only ever wanted to be there do her and be the one she goes to. This summer and the last couple years she’s been experiencing depression and cutting herself. This doesn’t shock my considering her past and her losses. She’s also been very spoiled and bratty ever since I can remember considering that she’s the youngest of her siblings. Long story short, we’ve spent all summer together and she’s been doing very well and not harming herself. Well recently she tried to overdose w/ alcohol but her mom got her to the hospital in time. She did this at my grandmas house with all our family around and it really created a lot of drama. She’s recently been released and at home and acting like nothing happened; like she didn’t just cause a death scare for our entire family. I feel so mad and hurt by this cause I know that she doesn’t want to die and she just has a terrible habit of doing dangerous things for attention. She doesn’t want to get better and she brags about her wild stories of drinking and drugs and hangs it over my head as if she’s “wiser” in her years because do this. I really pity her. If she ever did go too far and killed herself, I don’t know what I would do. I’d have no one to go to and that would fucking hurt. She always stands on the edge of a cliff to scare the living shit out of people and get attention. This game isn’t funny anymore. Is it wrong of me to feel this way?