I agree with the above. I don't see it as a reason to break up at all. As txymxy said, I never thought of my feet as attractive and knowing that my boy likes them just makes me feel that much more beautiful.
A foot fetish really isn't as big of a deal as most make it out to be. You should be comfortable enough to please him, as (I assume) he wants to please you as well.
If it really bothers you, why not sit down and discuss it? I feel that breaking up over such a casual thing is a waste of potential that the two of you may otherwise have.
Good luck & best wishes <3