My first time with a stranger

I tried having a one night stand with a stranger from a dating app. This was my first time trying kissing and oral. We didn't do anal because i told him i wasn't ready. After we came, he kissed me and said nice things about me. That made me attracted to him. But an hour later, he suddenly told me to leave without even asking for my number. I feel heartbroken even though it was just a casual hookup. I feel like he was going to be my boyfriend. Now i'm scared to try hooking up again because i get attached too easily. Maybe i'm just desperate?