Any advice. I just went to a 6th grade end of the year dance.?

Let me start from the beginning. My school was having an end of the year dance for 6th grade. This girl in my history class asked me to go with her. I said yes. It was a formal dance so I dressed up in black slacks, a white dress shirt, and a tie. I brought her some roses and she gave me a kiss on the cheek. We danced together and with our friends. Then, the DJ started a slow love song and I asked her to dance with me. She seems to really like me. After the dance I offered to walk her home. She said that's very sweet to think of her like that and yes. When we got to her porch she said she had a great time and I said the same. She kissed my forehead this time and I kissed her on the lips, The last day of school she gave me a hug, said she gong to miss me, and walked away crying. Last night I ran into her at the pool. We sat next to each other in the hot tub and she put her head on my shoulder. She said she was upset because she thought she wouldn't see me all summer. I said "Not to worry babe I'm here for you." She kissed me and gave me her phone number. Should I ask her out or does she just want to be friends?