dont know really know many taureans but bcos i have taurus moon , i am answering it based on what i feel . the best way , i think is to leave your father with his opinion rather than seeking it bcos i believe once a person makes up his mind not to see logic ( thats stubbornness in short ) you can't really do anything with them .
thats the way we hold grudges , at that time we have alraedy passed the judgement and there isn't anything that can be done afterwards .
btw, i hope you have checked out all the aspects of this realtion with your libra man .( my cancer sis is married to a libra .)
i hope u have alraedy thought of the fifnancial aspects and all bcos thats something that becomes an issue with us .
best of luck!