Teacher acts weird around me since she found out I'm gay. Help?

I would leave it for a bit. See if it goes from "weird" to "fine" or "weird" to "negative".
You're not there to make her comfortable. She's the adult. She's supposed to provide a safe environment for you.
She might be homophobic or worried how she might handle a crush from you so if you just act normally, hopefully she'll go back to normal.

 

I know it sounds cruel, but it's technically not any of her business whether she's uncomfortable with it or not. She's a teacher, and is supposed to do her job; to teach. If she's uncomfortable with the idea or with the fact she just found out, then that's her own problem. There's nothing you can do it about it. Your teacher isn't supposed to get wrapped up in the personal lives of their students most of the time.

HOWEVER, if she does anything that makes you feel uncomfortable (like a rude remark or gesture), then you get another teacher's help.

 

Keep a written record of every time you think that the teacher is acting oddly to you, even if it's just a funny feeling you get. If, after a time things don't return to normal, read back through your list. Maybe you'll decide that you were being oversensitve and you can let it go. If the teacher continues to give you a bad feeling, and particularly if she says anything about your situation, then you need to see your counselor, if the school has one, or your principal, and let them know that you are being made to feel uncomfortable. They are obliged to provide you with a safe environment where you don't feel like you're being watched or judged or whatever.

 

I agree with the other posters.. It is her job to teach the students and to make them feel like they are in a safe and happy environment.. Your personal life is not any of her business.. And it is not up to you to make her feel comfortable about it. Just keep doing what you are doing and I think of she makes you feel uncomfortable, maybe see the principal or someone higher you could speak with..