Sadly it's not Hyunjoong, but her close friend, Ryu Shi Won! (Beautiful Days, Wedding). She revealed that whenever she's bored, she will call Ryu Shi Won and he will cheer her up and even treat her to meals. On a recent episode on Infinity Girls, she said that she made the chocolates herself as a "Thank You" for his friendship.
Park Bo Ram asked her about Ryu Shi Won being the man she will marry, and she replied, "I thought about it, but I think it's better if we remained good friends for life."
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As you can see, they're really close!!~ ^^ Hwangbo has a lot of guy friends, so I don't mind this news that much. But still.. I wished she gave the chocolates to Hyunjoong instead...
Credits: Hwangbo's Cyworld + Daum + Star News