First you're gonna want to find a cute 2-D girl that you're absolutely in love with but won't admit you are publicly. Any cute 2-D girl will do, here's a personal favorite of mine

Next, you want to prented you know nothing about waifus or anime but be swift and merciless when correcting someone as soon as they spout false information about your precious waifu. Take extra steps to correct them in japanese to show them you're a REAL closet otaku and their body pillow doesn't stand up like yours does.

Now is where you've secretly accepted that you're a weeb, congratulations! But you're too attached to your fragile masculinity to publicly come out, and that's okay! Just continue spouting off about your 2-D wife and imitating all those cool moves from the japanese cartoons in the privacy of your own home. No one can judge you for being a weeb, and you still get all the amazing perks of being an absolute weeaboo!