Is Algernon Moncrieff really in love with Cecily Cardew?

The four main characters in Oscar Wilde's comedy of manner The Importance of Being Earnest are depicted as superficial people, so it's difficult to know if they are even capable of any deep feelings like love. Algernon claims to be in love with Cecily, but we also know that he embarks on his "Bunbury" to Jack's country house to meet Cecily at one of his games, one that he pursues simply for his own "pleasure."
When Algernon (pretending to be Ernest) meets Cecily, he claims to fall in love with her immediately. He speaks in hyperbole, which allows Wilde to mock the characters for their seeming ability to fall in love based on nothing at all. Meanwhile, Cecily has invented an entire backstory for their relationship, including a broken engagement, all of which she has recorded in her diary. The exchange between Cecily and Algernon about her diary and about their supposed long-standing love affair is beyond absurd; however, Algernon plays along, and the two decide they want to be married. This occurs within mere moments of them meeting for the first time. Cecily's idea of Ernest is based purely on rumor and speculation; she has heard he has a "bad reputation" as someone who is "always getting into scrapes," but that intrigues her. Algernon has only heard that Cecily is 18 and pretty and is Jack's ward. Let's also not forget that Algernon is not Ernest; "Ernest" doesn't even exist. The two "fall in love" based on lies and reputations, which are only built on superficial details, gossip, and few moments of conversation. I don't think Wilde intends for us to believe that the two are genuinely in love.