He will someday maybe with Sandy...
Sb/Sc Hints I've Spotted :Tea At The Treedom: Sandy-I like you, Spongebob. We could be tighter than bark on a tree. Spongebob-Uh...I like you, too, Sandy. LATER: (when trying to leave Sandy's treedome, Spongebob hears her voice inside his head and "harp" music plays.) Patrick: Don't worry, buddy, you're doing fine; you're just being shy; I won't let you blow this one. Sandy's Rocket: Patrick- Won't Sandy be proud! Spongebob-Oh, no, Sandy! I forgot all about her. She's gonna hate us for stealing her rocket, but won't she feel silly when I bring her back a real, live alien? Ah, she'll love me! PatrickSmartPants: Spongebob-Sandy, are you home? I need some professional help-(looks inside her treedome and sees Sandy and Patrick laughing together, face droops) At His House: I'd never thought I'd lose my best friend-how can I compete with geniuses? A Flea In Her Dome: Again, almost everything in this episode is proof. He goes to all that trouble to throw her party, and when they eat the cake they baked, Spongebob says a bit bashfully and sheepishly: "Sandy Patrick and I made this cake especially for your return." Atlantis Squarepantis(most recent): Lord Royal Highness: Your friend Sandy is rather excitable, isn't she? Spongebob: Quite. (In a that's why I like her tone) Hehehe
Those are all the hints I can think of