I have a crush and I need help?

I'm 12 and she's 11. I met Sam only a week ago when we went to the park. (Me and some friends). Alec and I went to the park to meet up with Alecs gf and Alecs gf was with Erika and Sam. They're both my other friend Alecs sisters and they're younger than him. Sam is a year younger and Erika is like in 2nd grade. Alright so then everybody goes for a walk and some others friends come on bikes and get off to talk to us. The girls go on the bikes and they're holding water bottle so Sam comes over and asks "Can you hold this for me dude?" I go "I do have a name." She says "What is it?" I say "Kevin" then I ask "What's yours?" She says "Sam" and rides off. They just rode in sewers. So thats how we met. That night I texted Alec telling him I like Sam. The next day Me, Alec, Alex, Makayla (Alecs gf) had plans to go to water world when I figure out Sam is going to. So I spent the whole day with her. At the end of the day I bought everyone ice cream and then I went to get some fries. When I came back they were looking for me. After that they all thank me and sam says Im so nice. So now I want to know if she likes me or not. It's been a week since the first day we met and I've seen her almost everyday since. I want to know if she likes me or not. Here's the same question with a little more details. http://answers.yahoo.com/question/index;_ylt=AgMg2xFjifFgujh6pEwrP5fty6IX;_ylv=3?qid=20100807210258AAzl5n1