Honestly? Go for it girl, but as well don't be scared to express your love for him. One day when you both aren't busy or having to do much stuff confess to him properly, actually tell him what you feel not in small words but everything you told here. He might reject or not, but what matters is that you will be open to him and tell him how you feel. All I can say is for you to not be scared (also you can dm me about him, I will listen)