The phrase "make hints" is correct and usable in written English.
It can be used when making suggestions without being too direct. For example, "He was trying to make hints that he wanted to take her out to dinner."
Just make hints that you're bored.
Once you're in a comfortable place, make hints.
You don't want to be straight forward about telling the person, so maybe make hints.
Once you're there, let her cry it out, make hints you like her, but don't go all in yet.
Throughout the night try and stay close to him, and make hints (but don't act like a stalker, that's just awkward and weird).
If he (or yourself) is too shy or not confident to ask each other out, make hints or tips that you are attracted to him.
Separating the businesses will also force customers to make a choice, and it is obvious which choice Hastings wants them to make (hint: it starts with an "N").
In 2008, Cuse and Lindelof made hints there were possibilities of the character's returning.
Accidental Billionaires makes hints at autism spectrum disorder, signaled by Zuckerberg's widely reported awkwardness, and his attachment to cargo shorts and flip flops even in the Boston winters.
In late August and September 2008, while Dewees was touring with Reggie and the Full Effect, he began making hints that The Get Up Kids would be reuniting to commemorate the tenth anniversary of the band's second album Something to Write Home About.
Instead of making hints, come right out and ask when the two of them are planning the wedding.
