Well, for a start he spent more time with aeris throughout her time in the game, even though he had known tifa for so much longer, now surely tifa would find that a bit strange...obviously not since she showed no signs of jelousy
but still thats 1 fact.
Could you better define 'spent more time with Aerith', User? Because in all 'official' images of the game being played (Memorial Album, Reminiscence, etc.) Tifa is always in Cloud's party when available. Aerith rotates out with Barrett.
Furthermore, according to local gossip, Cloud and Tifa are quite pally with each other during his convalescence, to which some person says in essence 'Childhood friend. You're not fooling anyone', among other gossipy bits.
I'd have to disagree with my usernamed friend here and I'm trying to recall where Tifa does get jealous about Aerith. The two actually get quite jealous between eachother throughout the game iirc. But he's right that during the first disk, you do get alot more time with her, and alot of the time she insists upon being taken in the party.
She insists upon is when she's member no 2. of 2, and the ToA. At no other time is she explicitly required.
Also, I don't know what quote you two are referring to. If you can find it, then enlighten me. But the way that I see it (it's not so much about being unhappy with Tifa, that was just sarcasm) is that Cloud's sick, yeah? He doesn't want the other's knowing he's sick, and so he hides out in the most comfortable place to him, being Aerith's church.
No. He RUNS from his comfort. AC Prologue book, IIRC, states this. It might be echoed in Reunion Files somewhere.
Being in a place that was her second home is probably comforting to him in his sickness. Not to mention that it's also where the place he was healed of his stigma.
But that hasn't happened yet.
And it's where a LOT of people got healed of stigma.
ZOMFG Derith?
Again though, you're getting ahead of yourself.
Loves in the first place is needed before loves more than the other. First principles!