Actor Yoo Yun Suk�discussed his�fellow actor Song Joong Ki, his one-sided relationship with Sung Yuri, and his past romantic relationships on the latest episode of�SBS'�'Healing Camp'.

Following his introduction as a guest on the show, Yoo Yun Suk revealed that he has been a true fan of Sung Yuri since her�Fin.K.L�days. He revealed he had treasured her picture in his wallet because she was so "cute."

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Sung Yuri started off and said, "I'm acquainted with Yoo Yun Suk." The actor then added, "It's true. I have been a fan, and now I've been signed under the same agency with her. Truthfully, even now if I go near Sung Yuri, I get nervous. In the past, I used to keep a picture of her in my wallet."�

The actor also talked about the various difficulties that he's faced since his debut 11 years ago. The MCs mentioned that he is considered a rookie, but it's actually been almost 10 years since his debut and only recently has he been getting the recognition he deserves.�

MC Kim Jae Dong said, "Yoo Yun Suk seems to be concerned about Song Joong Ki." Yoo Yun Suk and Song Joong Ki were co-stars in the hit movie 'Wolf Boy', and while Song Joong Ki received a lot of praise for his acting, Yoo Yun Suk garnered the nickname "nation's bad boy" and "guy you want to slap."

Yoo Yun Suk said, "For young actors, the military is a very big issue. Since I enlisted early, I am able to be more active while others enlist."�

When the MCs asked when Song Joong Ki is discharged,�the actor answered firmly, "Around May," revealing that he had been keeping tabs on his rival.

The actor then added, "Before everyone gets discharged, I have to focus and film more."�

Lastly, Yoo Yun Suk told a heartbreaking story of when he had a crush on a senior girl in college who was popular with the boys. He began, "I graduated from all-boys middle and high schools and went into college. It was a new world then.�There, I met a senior girl, but she was very popular with the guys."�

Yoo Yun Suk added, "I ate with her and even went shopping with her. I just liked being around her. At the time, my friend came back from studying abroad, so we spent time together. In the end, he began having feelings for her as well."�

The actor continued, "I had a hard time because she was so popular. It was even worse because even my friend said he liked her. It made me sad that I couldn't confess my feelings for her."�