I agree with nightcrawler. But I think that you should tell that your mom first. I don't think that by telling her that it would make things awkward. I mean she is your mother, and she should love you no matter what your sexual orientation is, and your orientation is not a big deal, I mean it doesn't make you worse than others. I think that with boyfriend you should be careful. I don't now how sensitive he is, but it may ''injure'' his self-esteem. But anyways lying to him wouldn't be the right thing to do. And it wouldn't be good for you too. Maybe just tel him the truth? I doubt that this is his fault, you just have to convince him that it wast his fault that you are lesbian. Good luck:)