I agree. Also, I think co-dependency can be a personality trait developed early in life, regardless of whether you are raised around addictions (I wasn't). This trait can be toxic all by itself. Anyway, the fact that Newlywed finds herself in this "mess" after only 4 months of marriage doesn't necessarily make her a co-dependent. She is new to this and is shocked and confused.
Newlywed, read the many posts here. You can make healthy decisions for yourself and your future. You've got the rest of your life ahead of you.