ahhh hello, nice to meet you....
now I am afraid to post simply because of the hello fiasco.
But anyhow I feel that this is a serious question, and it warrents a response.
Judging from the way youre post is written.... it looks like your mom already knows. This truely is not something you can hide from parents. You live with them, and spent most of your lifetime with them.
She must know, but it sounds like she is waiting for you to fess up. She will be hurt I am sure, and there may be many tears from both of you.
She is your mother after all, and she may not accept your sexual preferance, but if she really loves you (i am sure she must) she will accept you the way you are.
This is a hard time in your life right now... High school, dating, discovering feelings, becoming an adult... and if you play your cards right, and be calm and approach things by looking at both sides, you should do fine.
Let me say it wont be a bed of roses, it will be a bed of roses with sharp thorns, so stick to your guns and be real to yourself......
And for the record, there is nothing wrong with being gay or homosexual so to speak, so dont try to change for others....
I could tell you a funny story there.... If you like! about my ex-boyfriend, who was dating me to become straight...... he called me one night and said that he wanted to break up with me.... and I said "what? are you gay or something?" he said "how did you know?" I laughed it off, and said "I had a feeling" we remained friends... I wonder what happened to him? ah well such is the way of life.
take care pal
-Haruka