The phrase 'develop an attachment' is correct and can be used in written English.
You can use it to describe forming a strong bond or emotional connection with someone or something. For example, "After working together for several years, the coworkers had developed an attachment to one another."
As the mother, she expects her son to develop an attachment to her; instead, he is attached to the cats who don't care a bit for him.
People develop an attachment to their pens, she said.
Sanders, who is seventy-five, may be too old to run again in 2020, but his barnstorming has a purpose — to deepen the connection to progressive ideas in rural America, to develop an attachment that might outlast him.
"The regional identity of football has become less distinct over time," Doyle said, pointing to "the rise of ESPN and the fact that kids can grow up in Oregon and North Dakota and develop an attachment to Alabama".
"Birds, and especially anatidae — like ducks — will develop an attachment to the first beings they come across in their earliest days of life," explained Michel Saint Jalme, the director of the zoo at the Jardin des Plantes in Paris.
They married a few years later and have been in perpetual motion ever since, staying in places long enough to develop an attachment, missing them when they, inevitably, leave.
Local residents developed an attachment to these quaint old places".
After he died, she developed an attachment to another servant: her Hindustani teacher Abdul Karim.
She developed an attachment to Bernie Williams and was bereft when he wasn't re-signed.
With a clever economy of means, "Machine Love" conveys the blooming of feelings inside the android, who is slowly developing an attachment to a woman who works nearby.
Against his will he develops an attachment to a new widow (Samantha Morton) that the movie wisely refrains from turning into an instant happy ending.
