I am a freshmen in high school. There is this girl that I've started to talk to for about a week. She is in three of my classes and I would always walk with her to class, we also talk a lot. Everyday after school, I would go to the weight room. The weight room is right next to the soccer field (she has soccer practice), so we would always talk before she goes off to practice. I think she was flirting with me because she would ask me how her lotion smelled, she would ruffle/play with my hair, and she would always serenade me with Love Story by Taylor Swift. I would flirt/tease her back and I enjoyed it. I have another good friend who is also in soccer, she and the girl that I like are close friends and she told me that the girl I liked thought I was really cute. My friend told me that the girl I liked would always talk about me during practice. Last Friday, she sat up really close to me while I was waiting for the weight room to open. She also went to the weight room and while inside, she made a heart with her hands towards me and smiled. I thought everything was going perfectly with me and this and that I may actually be lucky and get this smart,funny, outgoing, and pretty girl. Everything was going well until she went to this party on Sunday. There was this guy at the party, who I thought she asked to the Sadie Hawkins Dance before we even started talking. I thought it was okay that she was going to the dance with this dude since she asked him before she knew me. Then today, I found out he asked him on Sunday, not before I knew her. I thought it was fine, maybe she promised to ask him or something and I didn't bother to question myself about it. Then after school, the most terrible news hit me. My friend who has soccer with the girl I like told me that the guy who she asked to the dance kissed her on Sunday at the party (I didn't go because I didn't know the party host). What seemed like a pretty simple dance between the girl I like and that dude just turned into a full on "relationship." She hasn't formally declared that they are together but I think I may be losing to him. I was deeply saddened by this because I thought that girl and I had something going on. She led me on by flirting with me, only to shoot me in the back at the end. But I don't think it was her fault. I think it was that dude's fault because he was being disrespectful by kissing her out of the blue. He didn't even ask for the girl's opinion and kissed her. That guy is a gang banger and he uses steroids to look "big." It seems unfair because he made a move before I did when I only knew that girl for a week or two. I like that girl a lot and I don't want to give up on her. What should I do?