Be honest polite ad respect her words and let her know that jut how you respect her she should respect the way you feel. Also tell her it's really important to you so that she can get the idea that this is really important to you oh and if she can't get used to the idea just give her some time to process it and to accept it
Just come clean and tell her I mean sure she will probably be upset and all, but she is your mother and should understand where you stand at and that this choice of you liking girls suits you more and have an explanation too of why you like girls instead of guys and just break it to her slowly piece by piece so that she can comprehend all of this of how you feel and that you would like to know what she thinks about it which I would believe at first she would be shocked and want to know why you feel this way....
First, know her personal view on gay/lesbian people. Then if she doesn't care, just tell her that you're a lesbian. It's not a crime. Plus, you don't have to tell her anything if you don't want to. Just blend in with the crowd.
Well, you must know what is your mom personality like. If she is easy for everything, just tell her "mom, i think i like girl" and may be she would say "yes". If your mother have lots of problem, just wait and time will prove like while you are walking at the mall with your mom... Just say to a girl like "whoa, she look totally sexy!" And keep saying to every hot girl then she will know it.
sit her down. then tell her you have a different feeling about love and that you like the same sex because that`s you. and if she doesn't understand that's because she wants you to be perfect. but you still ar, but in her eyes . if she understands, then that means she is happy the way you are.
just say something that comes from your heart and tell her at the happiest time for her(not b-day or anniversary) she should understand. u don't need to change your self you are a human being you make your own decisions. hope this helps :)
Just be open and honest with her. Being you mother, obviously she loves you. Just come right out with it. Or if you're like me and don't like confrontation or anything like that, try writing a letter and mailing it to her.
Sit her down and tell her how much you love her how you appreciate everything she's done for you and how she raised a strong girl and then tell her and let her know just because you like girls doesn't make you different that your still the same person before you told her
I think that a lot of the suggestions above are great but it does depend on how your mom feels about a girl liking a girl. You might want to slowly ask her about that kind of thing like "Do you have any friends who are gay or lesbian" and if she says yes than say "Do you think that it is right to like the same sex" and she if says no I think you should take it pretty slow on breaking it to her. If she says yes you still want to be careful in telling her but you might not have to worry as much and it may be a lot easier knowing that she approved. But take the time to come up with what you are going to say and say it when you are ready. There is no need to rush into anything and be sure you like girls before you tell her. You might just be having conflicting emotions. Most teenage girls do question what their sexuality is and they can't tell if they are gay or straight. All I have to say is don't stress to much and tell your mom when you are ready and when you think she is too.