The female reproductive system produce egg cells and protect and nourish the offspring until birth. The male reproductive system produce and deposit sperm.
I would say that if she is being mean you can first try to talk it out with her (because relationships may take work sometimes and if she is really important both of you will be willing to put in the work), but if that doesn't go well and you really don't think it is going to work you should go to your other friends or family for support especially if she was a very important part of your life.
You can care for yourself while caring for others by simultaneously looking out for each other. For example, you can both eat vitamins to keep your bodies strong.
