What do you think of me turning down a guy who has a crush on me and then ignoring his texts?
Why do you plan to ignore his texts?
Because I'm scared to turn him down in person.
It's understandable that sometimes you don't reciprocate somebody's feelings, but you shouldn't ignore them. After you reject someone, it's polite to explain why. If you ignore them then they're likely to be confused and feel hurt.
I'm going to ignore him and deny all our conversations.
It's kind of rude to cut off all contact with someone out of the blue, so why not tell him you're not interested and if he still tries to change your mind-- then you cut off contact. You could be losing a great friend though, and you should give them that chance.