I had planned my ex's mom wedding for her. I knew about photography and wedding planning since I want to do that professionally, but like I pretty much planned it for her. I even helped her pick out her dress, her flowers, her makeup and shoes. She was happy to have me help her. Told me that she wouldn't have been able to do her whole wedding without me. Hell, I even helped her get dress and get a discount on the photography. The day of the event she even thanked me in front of everyone during the toast. 

I thought we were close. I would help her cook when I would go over for dinner. We would tease my ex and even shop together. 

But not once did she acknowledge me as her daughter's long term girlfriend. Not once did she introduce me as  " my daughter's girlfriend" or even acknowledge that we were together. I hadn't notice it at the time becauae I was just happy to be accepted by my ex's family. 

When her daughter and I split after 3 years, almost 4, a mutual friend said that her mom had said something along the words of "oh now you can marry a guy and give my grandchildren and live a normal life"

Like fucking wow. Sure, I don't know the whole story, but like fucking wooooow.