A person is comparing herself to some disreputable school mates, thinking that she might be similar to them, and says:
やんなっちゃうなぁ
Is this a contraction of (い)やになっちゃうなぁ meaning "I ended up becoming unlikeable"?
I'm coming across more and more of these contractions as I read more, and they keep tripping me up. Are there any general rules I should know that will help me figure this stuff out on my own?