Marriages are done between men and women irrespective of caste, creed or religion. Inter caste marriage is not a yoga as you think it to be and is not prevented by astrology. Read Mahabharatha once and you will be rid of such misconceptions.

Your question has no answers in Astrology. Your parents and your relationship with them has no place in astrological evaluations based on your birth details. Each one of us are unique and has a deed to perform as decided by the God. If you want to please your parents, do not get involved in this marriage. That is up to you.