Usually when someone says "every," it doesn't require a lot of interpretation.
"Heteronormative" is acting in a way that is stereotypical of heterosexual couples.
The op's quote is attributed to Nicholas Sparks, a bastion of heterosexual luv.
Part of femme invisibility is the constant assumption that we act (or are) just like straight women. Some of us relish that role because it fits who we are. Some of us don't. Many of us get cranky when we are yet again expected to fall in line with a quote usurped from the straight community and "applied" to us.
I, personally, have a problem with not giving credit to the author of the quote, but I'm persnickety.
As far as posting your own stuff, you might check out other writing threads and see the comments. It's hard to put your stuff out there. Good luck!