Was I being a slut??????? What should I do? (Story of what happened here)?

Well no you're not a slut for talking to a guy, that's natural. I say take things slow and get to know him. Exchange numbers and maybe hang out at some school events to see if your attraction is more than physical. You are still young so I wouldn't get too wrapped up in just one guy. Date them all until you meet someone who shares your values, beliefs, and always shows you respect.