You would be wrong then: Here is some examples in the script:
This scene is on Disc 2 before the orphanage reveal right after Squall confronts Ellone for sending him to the past:
Squall: (What Ellone said under her breath was... You're my only hope. Why do
people depend on each other? In the end, you're on your own. I've made
it this far by myself. Sure, I couldn't do a thing when I was a kid...
I've depended on others, but... I'll be the first to admit that I'm
here because of other people.)
[While Squall is thinking, Ellone has already left on the White SeeD
ship. Later on, he lies on his bed, still contemplating.]
Squall: (I'm fine by myself now. I have all the skills I need to survive. I'm
not a child anymore. That's a lie. I don't know anything. I'm confused.
I don't want to depend on anyone. How can I do that? Someone tell me...
Someone? So I'll end up depending on others after all.)
[Flashback...? A small child stands outside in the rain, his back to a pillar.]
Boy: "...Sis... I'm...all alone. But I'm doing my best... I'll be ok without
you, Sis. I'll be able to take care of myself.
Squall and Rinoa discussing his feelings on why he pushed people away on the Ragnarok:
Squall: "I can't remember anything about my parents... But...Ellone was there
for me. Ellone was there to hold my hand."
Rinoa: "Made you feel safe and secure?"
Squall: "Sure. But she left. Just disappeared. I'm afraid.. Afraid of having
that feeling of comfort taken away..."
Rinoa: "You were afraid of losing us? Is that why you kept your
distance?"
Squall: "I was always alone...
Rinoa: "Squall... You missed out on all the good things in life. You've missed
out on so much."
The orphanage scene where they are discussing Quistis enrolling at Garden when she was 10 and Squall who was 9 would mention his sister:
Squall: "Yeah... Quistis always used to break us up."
Quistis: "Yes! That's right! Seifer was a kid who always needed to be the
center of attention. But Squall always used to ignore him... But
eventually they would end up fighting. Squall could have easily walked
away from it, but always took up the challenge. He should've just
ignored him, but Squall, almost in tears, would say...'I gotta do my
best by myself. Or else I won't be able to see Sis'. I guess I was
trying to take Sis...I mean, Ellone's place. I tried, but to no
avail... That's probably it! Even after becoming an instructor, I
couldn't stop thinking about Squall. I thought it was...love. I had to
hide my feelings because I was an instructor, but I've come to
realize it wasn't. It was my childhood feelings as a big sister that
lingered... Oh well.
Squall at the concert with Rinoa BEFORE the orphanage reveal:
Am I that untrusting...? Maybe I'm this way because I'm scared.
Nothing lasts in this world. It feels great to have friends who believe
in you, and adults you can rely on. That's why it's so dangerous,
especially if you become used to it. Someday you're bound to lose
everything. Everyone around you will be gone. Then what are you left
with? Nothing. Nobody... It's so miserable. And it's inevitable. It's
so hard to recover from something like that. I never ever want to deal
with that again. I can't. Even if it means being alone..
IIRC there is more examples but I can't look right now.