I've been with my boyfriend for a year and I am very happy. My closest female cousin is 2 years older than I am and we have always been very close growing up. Well lately she's been acting weird in the last couple months. She is used to getting a lot of attention, usually for the wrong reasons(not something she would be necessarily proud of), but does like to get any attention. She's been going out on a lot of dates and in the last couple weeks, now has a new "boyfriend". They went on a date and now are "together". She's been talking about him to everyone in the family and is mad at me because I'm not "over joyed" that she has a new guy. Well, truthfully, I think she's moving way too fast and with her background, I'm a bit worried. She got knocked up in high school and has a few pregnancy scares since with different guys. I've tried talking to her about taking it slow, but she won't listen. Her attention seeking can drive me crazy at times. I don't know if I should just back off or should I stay with how I am now? I don't agree with what she is doing. She said I'm just jealous that she has someone now, as if it makes a big difference to me. She tends to be one of those "serial daters", so I don't want it to end up like that again for the nth time. Do I get involved or just let her make what ever mistake she will again?