Why do people keep trying to put me down or compete with me?

[Neil]

Because they see it gets to you, you say you don't want to compete, but you're clearly 'keeping score'.

Unfortunately a lot of people like to be aggressive, instead of just asserting themselves(meaning they like to 'shine at the expense of...', instead of just being the best self they can be), often it's even promoted of course, in school, sports, and general education.

So basically for it to stop, stop following her on Twitter, stop investing in things you claim to not be interested in.

You're already saying the right things, now you just need to line that up with your actions, because you're still heavily invested in competing for this guy, and following your 'enemy' is never clever.

Focus on the positive, focus on the good, be constructive in your life, and ingore the bad all together, it'll go away if you stop feeding it.