Did I catch feelings too fast with him viewing it platonically?

Captaincheeks
me and this guy have dated in highschool, but it was wrong timing. We first became friends in middle school and was two peas in a pod, inseparable. We knew how to make each other smile, shared music. he barely showed up to school and ended up doing school online, he would stay in contact with me but it wasn’t like before. days ago he texted to see if he wanted to hang out since it’s been forever. We went to the park to talk. We laughed some moments and chilled. I missed him, I missed us. He never talked about what was going through his life and just wanted to know what was going on with me. I needed more time with him so I invited him to go to the amusement park with me and he said yes immediately and told me he was excited. it’s the day of the amusement park. He shows up at my home 30 minutes early. he was by my side riding rides. We took a break at the arcade because of the heat and then he said “usually couples come to the arcade together” but he never intended it on us. We played games, the shooting ones, etc. trip back in the car we were both exhausted, he laidback his seat and play his music in the car. I had the whole back to myself. Everytime he played a song he would look at me for several seconds, I would smile each time. He reached his hand towards me and I don’t know why he did so, I tried to touch his hand to see his reaction he pulled back immediately. I felt like I did something wrong. He would say things to make me smile. He blurted out in the car “I’m exhausted now but I’m happy.” When he said the word happy he looked at me. But when my dad had to stop and go to the store. It was just me and him in the car then he blunty said that his girlfriend liked the song I was playing. Which took me to a stop. I felt so many emotions at once. I wish he would’ve told me this beforehand because now I feel like a absolute idiot for flirting and showing interest with him when he has a girlfriend. I just wanted to try to fix things for us but it’s too late.
Did I catch feelings too fast with him viewing it platonically?
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