Oooooooh anon! It’s my job to a) make you feel better and b) to throw enjoltaire fluff in every direction, you came to the right place! Now let us consider :
Enjolras waking up from a terrible and very vivid nightmare and Grantaire rocking him back to sleep while humming a song because he has a very beautiful singing voice
Enjolras trying to cook breakfast for once and fucking it up completely and ending up presenting burnt toasts, an over-cooked egg and his apologies. But Grantaire doesn’t care, at least he got that blush on his cheeks he loves so much right
Grantaire getting the worst back aches because of his terrible posture and the fact that he’s focused on his work so much so Enjolras volunteers to give him generously long and in-depth massages
Sorry but there is nothing cuter than Enjolras calling Grantaire “mon coeur” and Grantaire calling Enjolras “mon ange”
And they whisper these little names as often as they can and it still feels special each time because they have never called anyone else like that before
Them being able to communicate silently. Grantaire can sense when Enjolras is uncomfortable or angry and he takes his hand and brushes his thumb with his to reassure/calm him down