I don't mean to offend in my question, but I am a straight girl, and I've nearly been asked out by a another girl before. I freaked out internally a little because I didn't want to be like, "sorry, I'm straight", and I didn't have a boyfriend and didn't wanna lie about it, especially since she didn't deserve it. So I was just wondering of how I should do it?
There's nothing wrong with you telling a girl you're straight; it's not an insult, it's just telling her that you're not into dating girls. If you just tell her "no, sorry" she'll be left without an answer as to why you turned her down and may take it personally. If that feels too blunt for you, try saying "Sorry, I don't swing that way" or "I play for the other team".
Honestly... most bi or lesbian females if they know your straight know most likely there going to be rejected.. but in the small off chance why not try.. but in the offsense if she doesn't your know your straight.. still im sorry but Im strictly dickly and have tried before and not my thing but it is flattering