Momiji Sohma learned to overcome loneliness with a great wide smile. His charm and wit and grace and poise were learned traits; it took dozens of self-help books and an embarrassing amount of practice. Love was a coping mechanism, his saving grace. Momiji told people often with sincerity that he cared and loved, respected and supported. People smiled in response. The iciness of cynicism never sunk in; Momiji took painstaking effort to be worthy of affection in return.
His identity as the Zodiac rabbit was designed to keep his love within his chest. Momiji worried if his words of kindness were enough. His greatest fear was the intense love he felt for others remained unknown. Even touching someone on the shoulder as a sign of empathy was out of the question for some of his friends. Many of Momiji's friends were women. He feared that they would think of him differently for being so cold, so unaffectionate.
Momiji hated that there were so many rules about socializing that weren't explicitly clear. No physical contact with those of the opposite gender in any form felt restrictive and unfair (what an understatement, Momiji thought in a brief moment of sadness). Love was an integral part of his life. He was inventive, though, and resourceful: sometimes, he tried wearing garish gloves to exploit a loophole. Momiji was crushed to know it wasn't something he could successfully exploit.
Being a part of the Zodiac kept Momiji isolated within a tight-knit community. Sure, he had his plethora of family that supported him, who understood what he went through. That was a relief, that sense of familial solidarity. Kagura was especially kind to him, and Momiji appreciated that even if it was born of pity. Her kindness came in waves and when she wasn't chasing Kyo. She was older and therefore, wiser (even if she sometimes acted weird).
Haru, being the same age, was Momiji's best friend: Haru taught Momiji everything about romance, which was a blend of idealization and reality. That was a tidbit that Momiji had trouble wrapping his head around. It was Haru who helped Momiji realize that loneliness was the real curse. Haru said the inability to show love in physical ways to anyone out of the family would eat anyone up alive if there wasn't any defense in the form of love and romance.
Romance was sensuality, passion, a burning flame that couldn't ever die Haru said, and Momiji learned something new about Haru. This was a deep secret, because Haru had a reputation to uphold. Momiji had briefly resorted to showing off with material items to show romance wasn't dead with fancy chocolates and frilly flowers.
It seemed as if the isolation wired in his blood had yet to disappear from his life. Momiji feared that the curse wouldn't ever be broken, that he'd drown in a pit of despair forever.
When the curse finally broke, Momiji cried.