Both signs are usually okay with having a friends with benefits situation, too. You might find this pair in a committed relationship, but you could also find them hooking up together (and having just as much fun).
Aquarius tends to blend their romantic and platonic relationships, which can make the boundaries of their relationships a little bit blurry.
Aquarians tend to fall in love slower than Sagittariuses do. This has the potential to cause problems if Sagittarius expresses their feelings before the Aquarius is ready.
Fortunately, since both signs value their space so much, they each understand why the other person needs so much privacy.
You might find this pairing staying up until sunrise discussing anything from aliens to the afterlife (and what you’ll never see is them talking about mundane things, like the weather).
You can think of their relationship as more of a slow burn rather than a quick fling.