Since the definition of a weeaboo is someone else trying to be japanese and denouncing their own culture it's impossible unless you've never been really shown what japan is. However most likely you're an otaku if you like anime and that's by american definition
I put a bunch of numbers at the end of my Minecraft name in 2011, and regretted it ever since. Name changes at last. :'D I definitely feel for ya though, I finally changed the lowercase "f" on "fluttershyisbestpony" to a capital F during name change week.