Is this offensive?

baptistmom has a good point here:

The wording of your advertisement suggests highly of an attitude "I am looking for somebody worthy of me."

Perhaps you might consider "I am looking for somebody for whom I am worthy." Our own personal standards are not the only valid truths in our lives-- as shown in your ad, there are those whom you have learned much from and seek to emulate in order to become a better person. I do not think it wrong to have a similar kind of attitude when exploring relationships.

Instead of saying, "I want her to be good enough for me", perhaps you could approach it as "I want to be good enough for her". I think it might surprise you, how such attitudes can positively affect the progress of your courtship endeavors.