Me
Pronoun and の adjective
われ
我関せずって感じのアイツの態度、超嫌なんだけど。
I hate him acting as if he doesn’t care.
The kanji and the word are exactly the same. That means they share meanings as well.
Since this word is made up of a single kanji, it probably uses the kun'yomi reading. You did not learn this reading, so here's a mnemonic to help you remember:
It is I! Due to my ego, I love the Wii and no other gaming device. I love playing all the Wii-ware (われ) that's available, and everything else sucks.