Girls, should I Kiss Her?

Ok so there's this girl that I have a really big crush on and, acocording to her best friend, she has a huge crush on me as well. I'm going to ask her out tomorrow on a date this weekend, and I have a serious question regarding the first date.
It's not like we don't know each other already (we're comfortable with each other) so this won't be your typical "Get to Know You" first date. So this brings up the question: If everything is going well and we're having a great time, should I or shouldn't I kiss her?
P.S. We're both 14 (almost 15) and freshmen in high school.
Girls, should I Kiss Her?
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