Coming out??

I've always been pressured by my friends to come out to my parents, and having my first relationship (it was a female) and not having my parents to turn to when she ended up breaking up with me broke my heart. My parents are extremely close to my heart, and I know that they're okay with bisexuals/lesbians but I'm still scared that I won't live up to their expectations of being their perfect daughter. I want my parents to know what's going on with my life, but I'm scared that there's a possibility that they won't accept it.

Looking for help, please!