Protagonist becomes shackled by a deep and powerful attraction; the object of his attraction reciprocates his feelings, but the resulting bond consists entirely of their own selfish feelings.
The two stumble through life together thinking they're in love when all they truly have is a hollow mockery of love which extends no further than their own egos.
Alternatively:
Protagonist becomes shackled by a deep and powerful attraction; the object of his attraction reciprocates his feelings, but the resulting bond consists entirely of their own selfish feelings.
The two stumble through life together thinking they're in love when all they truly have is a hollow mockery of love which extends no further than their own egos.