I lied.
Originally I said Stellar’s first crush was someone else but come on….a big beautiful mare like Pinkie Pie can’t be tossed to the wayside!!

Stellar Rays, son of Queen Twilight Sparkle’s first crush was Pinkie Pie.
He was besties with Pinkie’s middle child and so he spent a LOT of time around her.
It hit him the hardest as he was going through puberty. He’d just sorta become attached to her since she was such a jovial lovely older mare!
Pinkie also loved to pick him up and give him a great Yak Yakistanian Hug [not helping the matter]

He didn’t so much as get OVER his crush on Pinkie, merely realized she was a married mare. He just fell for other ponies….[though he’s still all about her]

Momma Twilight and the rest of the main six are aware of this little crush…they all lightly tease Twi.