Celia isn't a bar girl. Celia likes Cake, but you need a Peach to make one, which requires growing a tree.
I already have 60 Sprites now (Finally!) and I'm in the Winter. But I won't propose to Celia yet. I'll propose to her on her birthday, and giving her a cake after I do, to make it a wedding present! (I hope my peach tree grows a peach by then!)