This may not be the meaning but to me it means something along the lines of a Man meeting a woman, falling for her (but not her falling for him). Then she meets someone else before he can do anything and he waits patiently waiting and hoping for her relationship fails so he can get another chance. Although he realizes that he should just give up on her and let her go be with another person and not to hope for her relationships to fail so he can get another chance that wont be taken.
This may not be the meaning but to me it means something along the lines of a Man meeting a woman, falling for her (but not her falling for him). Then she meets someone else before he can do anything and he waits patiently waiting and hoping for her relationship fails so he can get another chance. Although he realizes that he should just give up on her and let her go be with another person and not to hope for her relationships to fail so he can get another chance that wont be taken.
That's just what it seems to me though.