So this is like Image #3 of this ship on the entire internet.

i actually approve of lapis/steven.
sure Steven & Connie are 100% going to end up together…. for maybe a centurey.
add maybe a 1-2 more for greif and getting over her.

After that who knows? Lapis and Steven obviously have very strong, positive, feelings towards each other.
One currently in a self sacrificing situation for the other,
Steven meeting Lapis (a mysterious older girl) during his social peer-bonding years (early puberty).

the Chemistry looks good to me folks.