If someone has a crush on him, he'd do his best to keep calm about the situation and see if he wants to date them... Though he does get flustered easily

If he has a crush on someone, he'll at first ignore it, but if it turns into something more, he'll start making it known by hanging out more often, making more flirty jokes, subtle stuff. Then when he feels the time is right, he'll confess honestly, no unnecessary gifts or anything