What’s the biggest red flag you’ve seen/chosen to ignore?

Ok so this is a bit tricky because we were friends before we got together and we parted and smoked meth together so it wasn’t like I didn’t know that she did it. But once I decided to get my shit together for the both of us she decided that she still wanted to continue using. And she became a meth head and I literally sat here and watched her. And over time she began to change and instead of me putting my foot down I essentially supported her habit and I enabled her.