What should I do- I'm scared to come out of the closet about my sexuality!?

[anarchy]

Ok, I am a 16 year old girl, and I am a lesbian. I have known this ever since I was in grade school, I have always noticed girls and how pretty they are and I am sexually attracted to females, I have even been in love with another girl. I dont even look at guys, I could care less about them.I only like boys as friends, I dont see them as anything else. I know you are thinking that I am only a teenager, but I am not lieing and I am not going through a phase! I know myself better than most teenagers, and trust me, I am a true lesbian. But, what I really am terrified of is what my parents would say. My mom and my little sister are ignorant homophobes, my mom would probably disown me if she knew. But they get suspicious sometimes. Theyr'e always telling me that I act like a boy, and my dad has actually caught me looking at pictures of half naked girls before even though he just laughs it off. I even invited a girl over to my house one time as a "friend" and I guess I was stroking her hand and just acting really romantic with her, and my Dad was like "Is there something your'e not telling me"? Should I ever tell my parents or anybody? I don't want to have to take crap from stupid people just because I'm homosexual, what should I do, especially about my parents. I just have this feeling that they will find out eventually.