However you met, you’ve started out as friends with this person without thinking of dating them romantically.
Apart from flirting, you can also pay special attention to the way you look and dress, as well as attempting to take part in the activities that your friend likes.
For example, your crush may like to play badminton.
Even if you prefer other sports, make it a point to show up to his or her badminton sessions and take part, or just to cheer them on.
Your friend will appreciate the little efforts you make on their behalf.
Perhaps you didn’t really feel the chemistry in the beginning.