In my time here on this forum, I've realized to many guys are occupied with "how to impress her", "how to make her jealous", "how to get her to like me more". Instead of focusing on a girl, focus more on yourself.

Women sense when you're fake. Making her jealous on purpose can only backfire, and even if you do succeed in it, it's only short term solution and you'll feel even worse if you don't get the validation afterwards you wanted.

The only validation you should be going for, is your own. Make yourself a better man and you wont be needing any "sneaky" tactics solutions anymore.

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Uncertainty is the root of all progress and all growth.