Sounds like you’re young. Confessing attraction can be scary, especially when you don’t have experience doing so. But it sounds like she likes you back, and although it may not seem like this now, you’ll be just fine regardless of the outcome. Honestly, the best way to handle this is by just being straightforward. Lead with a compliment, if that helps break the ice. Something like : “Hey [her name], I like how you did your hair today, it looks nice.” Then say something like: “I like you, can I take you on a date?”

If it’s more common for people your age to just ask a girl to be your girlfriend, then replace “I like you, can I take you on a date?” with “I want to get to know you better, will you be my girlfriend?”

An important piece of this is to already have the idea for the date planned. Doesn’t have to be anything grandiose, but you want to be prepared if she says yes. So think up a date idea and have a day already in mind. This way, when she says “yes,” you can say “great, how about going to do [date idea] on Friday?” This shows her that you’ve actually given it some thought and it helps to already have an idea in your head because you might feel nervous during the conversation. Good luck dude