Well, I don't think I'm very good with the relationship advice, but I'll try.
I depends really. Ask yourself who you like more, and who you have a better shot at having a good relationship with. You don't want to be with someone who would more likely cheat, take advantage, or anything like that. I don't know these girls, so I can't be sure, but you do and can. So I say, follow your heart, and try your best.
'Cause you never know, you could grow up to be high-school sweehearts with one of them. Time will tell all tales.