Why am I still hung up on him

Back in January my sister (sister a) invited me to a party that her friend/bf was having at his house, we went and had a fun time and that was the first time I met this guy who happened to be my sisters bfs best friend. (He was 18 and I was 14 when we met) A few days after the party me and my other sister (sister b) were thrifting when sister a called me and told me that her bfs best friend thought I was cute and asked for my number so she wanted to make sure I was ok with her giving it to him which I ofc said yes to because I thought he was cute too. As we were shopping I get a text from him and that was the first time I realized I had a crush on him. We talked for a week on snapchat and then one night sister a told me to get ready to go to her bfs house and that boy b (the guy I liked) would be there. We get there and go down to his room in the basement and start talking and watching videos on YouTube and just chilling basically, my sister and her dude are on his bed cuddling and boy b is on a chair playing video games and I’m sitting on a couch next to him. My sister saw me looking at boy b and thought it would be funny to tell him to go cuddle me and he took it seriously and did. He came over to the couch and sat next to me and put his arm over me and told me I could put my head on his chest and so I did. We sat like that for a while and I fell asleep listing to his heartbeat. I woke up at like 6/7 to him on the chair asleep (kinda made me sad ngl but I didn’t think to much of it) we left and went home. A few days passed and my sister invited them to our house and so we went and picked them up, when we got to our house we all sat on a bed that was downstairs and started talking about basically nothing, he was making me laugh and that just made my crush on him even bigger. He told me not to be shy and to come cuddle so I did lmao. He put his arm around me and held my hand and in that time I knew I was fucked . When they were getting ready to leave my sister and her bf were upstairs while me and him were down there talking, my sister told him that they were leaving so I said bye and he started walking up the stairs when suddenly he stopped and froze for a second, he looked back at me and walked down the stairs walked over to me grabbed my face and kissed me,, girl when I tell you my world stopped spinning and I heard fairytale music playing and I felt literal sparks. After he kissed me he walked upstairs and I was stuck there frozen trying to process what had happened. A few days pass and we go to my sisters bfs house again but this time they have all their friends there and my boy doesn’t talk to me the entire time which made me wanna cry but then my dad told me I had to go home so my sister said that she had to take me home, she asked if anyone wanted to come and my boy said sure, we got in the car with me and boy b In the backseat, I wanted to cry because he wasn’t talking to me or acknowledging me at all until we were about 3 minutes from our house he looked at me and put his hand up in a fist bump way and was just looking at me and was saying “c’mon you know u wanna” and I was there looking at the audacity of the mf and I left his bitchass hanging. That was the last time I saw him in person. After I got home I snapped him saying “I’m kinda sad you didn’t talk to me at all” and he said “I’m sorry I was being weird “ I let it go but after like a month of talking to eachother i found out I was moving and so I sent him this big long thing about how I wish we could’ve been something but we can’t because I’m moving blah blah blah. A few months ago I sent him a dm on insta saying that I liked his hair (he dyed it pink from white and we kinda matched ). Another time he posted on his story saying some depression stuff and I was worried he was gonna do something bad so I sent him a dm saying “I’m literally in love with you” to which he replied “ i literally couldn’t care less” and I responded “period king!” I knew he was going through something but I just wanted to distract him. The next day he dmed me again saying “that was uncalled for im sorry” and I said “it’s all good I get it” and that’s it. I haven’t talked to him since . I haven’t been able to stop thinking about him and last night I had another dream about him. Is this just a crush?? He’s the last thing I think of at night and I don’t even know what to think of it, if any of y’all have any advice i would be eternally grateful! Let me know what you think:)