Not necessarily. If you are tired of the other person, it likely is because you are tired of your own worn out identity patterns, and you may be projecting this rigidity on the other. Lose the habits of self that have become rigid and that no longer fit who you really are, dip into the wellsprings of energy that empower and catalyze your spiritual growth and awakening, and I'll bet the beloved in your life will appear "new" as well, attractive in more ways than you ever before believed possible.
Relationships are challenging because BOTH people need to renew themselves as often as possible. That is indeed what I think is the answer to any sense of stagnation in a relationship: both people need to regularly shed the mental fixtures that define them and generate new, more current, and hopefully more transparent (in so far as your true Inner Being is visible) expressions of Self!