No offence guys/girls/peeps, but the scene is a follow up to the handreach scene between Cloud and Aerith within the lifestream, it's not about Tifa. Afterwards Cloud says "An answer from the Planet ... the Promised Land ...
I think
I can meet her there" with the most recent canon with Reminense being "I think I can find her there" Saying it's about spirit smex is silly, I don't think this but I do think Cloud wanted to meet Aerith for himself, personally for him/for himself for his own reasons, most prominent for forgiveness, because he does care about what happened to Aerith, her thoughts/feelings/etc about this and he wants forgiveness from her, it's not all about Tifa. Cloud doesn't mention Tifa, he doesn't say "we" (apologies if this sounds harsh), Tifa invites herself (not saying this is bad/wrong of her or anything) it is her who inserts/introduces "the let's, the "us""
As far as I know there is no nod or ok or any verbal or visual reaction from Cloud to this, he doesn't reassure Tifa, in the sense he doesn't say Tifa everything is ok, we are in mortal danger but it's go we are going to/let's meet Aerith in the Promised Land together (unless this was confirmed somewhere in an Ultimania or something and I missed it) (though since he doesn't actually object/say anything either I guess we could say Cloud saying nothing means he isn't actually disagreeing and take it as a sign of agreement, Cloud's weird like that, who the hell knows what he's thinking, if he doesn't make a fuss does it mean he's agreeing or not, I guess nobody can really tell whether or not he's agreeing ... but since in this case he goes -alone- to Aerith's church, he doesn't take Tifa with her to meet Aerith, whether on his random on and off visits like when he found Denzel or when he moved in on a temporary basis, Cloud says/thinks (originally) "Aerith brought Denzel to me" Tifa says "Aerith brought Denzel to -us-" , well if I remember that right), he doesn't conclude the hand reach scene with a three way spirit smex hand clasp between Cloud, Tifa, Aerith
By catching/holding Tifa in his arms it might have been general reassurance of Tifa in general though
Honestly mostly I think he just wanted to save her from falling which is reassuring in itself.
As I remember it the conclusion of the hand reach scene between Cloud and Aerith in the Bahamut fight was mentioned in Reminense as being used/put in/inserted there as a tribute to the hand reach scene in the original game
Well to me saying Cloud wanting to meet Aerith/the hand reach scene is about Tifa is as silly as Cloud/Aerith spirit smex (yes I like Clerith but it's not about sex to me since well it didn't happen
) and/or the peeps who would say the lifestream event, the childhood promise, etc is not about Cloud and Tifa but about Aerith since Aerith witnessed these events in the lifestream/because Aerith guided Tifa to Cloud in the lifestream/etc, silly stuffs like that!