If MEETING someone is enough, then Cloud is quite the slut. Also we SEE the church after ACC: Cloud moved Zack's gravemarker there, packed his things and left. He however is evidently still living with Barret, Marlene, Denzel and Tifa.
Maaya Sakamoto (Aerith's Japanese voice actress): "She's presented in this movie as Cloud remembers her, and her spirit is still with him - talking to him throughout the film." ~Reunion Files, pg. 58
"Cloud feels an incredible sense of guilt for not being able to save her [Aerith], but sometimes he can still hear her voice in a soft whisper." (Reunion Files, Aerith's profile)
"I tried to create an atmosphere in which she still seems to be by his side - in spirit at least." ~Nojima, Reunion Files, pg. 58
Cloud: "Aerith is here....and so is Sephiroth."
Cid: "Wa, wa, wait a minute. You serious!?"
Tifa "But how can you tell?"
Cloud "...It's not an excuse. I feel it in my soul." ~Final Fantasy VII
Aerith also appeared in Cloud's dreams during Final Fantasy VII when she tells him about her plan to stop Sephiroth.
To me, Cloud visiting and living in Aerith's Church, in addition to the spiritual connection shown between them during AC, shows us that they are able to communicate with each other and continue a spiritual relationship. Their relationship is established by SE as being romantic (Cloud is Aerith's koibito, Aerith is one of the heroines Cloud is wavering between, and Aerith is Tifa's "love rival"). Cloud and Aerith also share a romantic date together, in addition to many other romantic moments and cameo appearances.
Vincent, Barret, Dyne, and Elmyra all chose to live with the memory of their loved ones instead of moving on. Maybe Cloud is no different -- especially after he realizes how incompatible him and Tifa are?
And in the same way that Yuna searches and finally finds a way to bring back Tidus in FFX-2, I believe Cloud is continuing to search for ways to continue connecting with Aerith.
During the ending of ACC, the yellow and white flowers on the side of the road are still there during the credits. Nomura stated in the Reunion Files that yellow and white flowers are the colors of the flowers in Aerith's church. SE also states that flowers have "always" represented Aerith.
So although the ending of ACC is not as obvious as the ending of AC, I believe ACC still leaves viewers with the final impression that Cloud is still searching for ways to be with Aerith. SE knows that the credits are the final images viewers see, and since the credits happen after everything that had transpired before it, it is only reasonable to assume that anything new shown in the credits happens AFTER the events that came before it.
Yes, Cloud runs a delivery service. But the flowers on the side of the road continue to represent Aerith according to SE. They didn't show Cloud riding on a road that was surrounded by dirt or grass, they specifically chose to show Cloud riding through flower fields that represent Aerith (according to SE). The same flower fields that we see Cloud and Aerith connecting through during AC. The credits don't leave us with the final impression that Cloud is with Tifa and the children, the final impression we are left with is that Cloud is by himself, riding through flower fields, still searching for ways to continue connecting with Aerith.
But again -- Aerith does interact with Cloud both spiritually and physically during AC. Aerith physically boosts Cloud during the battle with Bahamut-Sin:
"Cloud's friends sent him toward Bahamut like a relay race, and as for the last push---Aerith!" ~FFVII 10th Anniversary Ultimania, Aerith's profile
If Cloud and Aerith can interact both physically and spiritually, I see no reason to assume a relationship can't continue between them (especially when we consider that love beyond death is a theme SE has repeated with several FF couples).