Op when I was around that age I told one of my sisters that she could do better than her long term boyfriend & fiancé, who had offered to stay with her and raise a baby she was pregnant with by a couple of possible fathers (She had been cheating on him).
My reasons were that he was scruffy, not good-looking and "just" a mechanic.
I encouraged her to go for a relationship with the main contender for fathering her baby - a Royal Military Policeman (let's call him "Shit head") who was handsome and relatively well spoken.
Before the baby was born, shit head was already going AWOL and saying he didn't know if he was up for it all.
When the baby was born, he came and went as he pleased and often went AWOL while my sister struggled with a new born.
They did end up cohabiting and marrying (the latter paid for by my parents) and he nearly missed the flight for the wedding & honeymoon abroad because he was hung over. He's been supposed to get married in his dress uniform but they had to hire him a suit because he was too disorganised in his hungover state to bring it.
He then proceeded to cheat on my sister, lie to her, gas light her etc.. throughout the marriage.
He spoke about her in such a way to his colleagues that one of them thought she was for "sharing" when she visited him where he was stationed. That colleague also let her know her h had joined a brothel trip in that country.
He eventually knocked her down, dragged her around the floor and physically threw her out & then locked her out of their home in her bare feet. (This was because of an argument that happened because she had walked into a local bar that evening, when he was supposed to be doing "overtime", to find him sitting there with two women she didn't know.
He did a lot of "overtime").
He asked my Mum for a sizeable loan behind my sister's back, implying she knew (she didn't), and using emotional blackmail (if I have debts, I don't get into the police and I'll have to move with your daughter and grandson elsewhere to get work). My sister says that the only reason my Mum saw a penny of the loan back was because she forced him to pay it.
He was a consistently shit father to their child, who asked to stop seeing him after they separated. I think being thumped in the back on one post separation visit was what ended my nephew's desire to continue seeing him. Though shithead had been useless and pushed all the childcare onto his mother long before that.
By the time they divorced, my sister was alcohol dependent...and still is years later.
Her ex fiancé is apparently happily married with a family.
So ..... The point of this essay is that, young people are fucking stupid.
Often pretentious and superficial.
They are, ateotd, still kids to some extent.
Imho it takes til the 30s for most young people to truly get a clue.
Ignore it, be embarrassed for her.
Maybe in time she'll be embarrassed for herself.