I have always liked boys, and I still do but I think I like girls too. Their attractive, sexy, and I like them, But Im not sure. And How do I tell my friends, and fammily, esp. my parents. someone help me??
Honestly I wouldn't say anything to anyone about it until you figure it out for yourself. There are several ways you can do that. The easiest would be to find a counselor/therapist that specializes in gay/lesbian tendencies. There not as hard to find as one might think.
But seriously, until you know for sure what's going on with your body,there's no need to start a maelstorm between your friends and family, not to mention all the tons of unwanted advice you are sure to get.
Some teens can be confused, especially in elementary/high school, but kids can be so judgmental that I wouldn't confide in any of your friends. Wait until after high school to explore your sexual feelings. You can see a counselor/therapist, but you will have to pay yourself or use insurance. Insurance statements end up going to your house where others may see it and this may not be what you want.
In today's society, girls, especially, get bombarded by TV, movies and advertising that promotes/hints at bisexualness or lesbianism and so the idea of being attracted to the same sex is not unusual. My coworker has a daughter in high school (an arts/music/drama school) where her daughter has told her that there are tons of girls who are bisexual. But this is in a large urban city.
It's also not unusual for girls to try this out. Sometimes it's just a passing phase. Only time will tell. And it's not the end of the world if you are attractive to girls. Unless you live in a large city, I'd wait until after high school.
I think I might be Bisexual? 
