I think the marriage was calculated for my sis in law as well. They loved each other a great deal, but I think companionship and commitment was/is more important. Being "in love" can fade, and if there is nothing else to hold people together, it's hard to keep a happy marriage going. Marrying for love alone is a relatively modern concept. Arranged marriages, marriage contracts and dowries are still very common in many parts of the world, across all cultures. So no, you are not bad at all.
Just think of yourself as traditional or old fashioned. You have an arranged marriage, you just arranged it yourself!
(I sure am glad my dad didn't get to choose my spouse!
)