I thought the start was kinda meh. "Delete me if you're not interested" doesn't really say confidence, and it indicates to the girl that you're not so attracted to her that you couldn't just move on to the next girl--that last bit isn't necessarily a bad vibe to give off, but I would do it a bit more playfully and with more subtlety.
You can still be cocky, but girls like to know that a guy is at least putting some effort into seducing them--otherwise I think they find it insulting and kind of a turnoff.
For this girl, I would suggest you at least try to use proper grammar and punctuation, if only as a way to mirror her style. It's not an absolute dealbreaker, but in online encounters with girls, it certainly helps you sound smart/impressive/whatever.
You can still be cocky, but girls like to know that a guy is at least putting some effort into seducing them--otherwise I think they find it insulting and kind of a turnoff.
For this girl, I would suggest you at least try to use proper grammar and punctuation, if only as a way to mirror her style. It's not an absolute dealbreaker, but in online encounters with girls, it certainly helps you sound smart/impressive/whatever.