Re: Without parents approval
Lets say u elope, further down the line your married life settles into something more mundane, you have an argument. During this time you are not eachother's favourite people. He runs off to mummy dearest, saying "Oh Ma, if only I had listened to you, your choice would have been better". Ma will say, "Oh my beta, if only u had listened to me, oh how devastated I was when u deserted me just bcos she made u do it..." etc, etc, laying on the guilt trip. He will feel terrible about what he did to his single mother and then resent you for it.
OK, u may think I'm exaggerating somewhat, but trust me, I have seen this happen and it ain't pretty.
BTW, I don't advise u to give up on eachother, as others have mentioned, persist in making her change her mind or at least get both your parents on board.