How can i convince my parents to let me be with my cousin?

I am in love with my cousin.He is 22 years old.and I am 24.Everybody is against us.He will become mental 0r he will die..if he cannot live with me..me too.No one is understanding us.he is not very good looking.We both have normal appearance...I am not...

fall in love because of infatuation..I am sure about it..he stayed in my house to do some course..So,We had a nice time to speak more about him and about me..We understand each other, and when my parents talk about my marriage..he gets depressed...I could not tolerate...if he talks about any girl...I will get angry,,I take care of him well...like serving food..etc...so he starts loving me...if somebody shouted at me ,he gets angry...now he is not staying in my house...everybody shouted at him..so he took separate room nearby and gone..everyday we are speaking through phone...I cannot leave him..I have 100% confidence about him..if I did not speak to him,he will become mental..I am very sure about that..
Because of this age difference ,I did not exposed my love to him for more than 6 month..one day I said to him,,and cried...He also cried...he said I am expecting this from you for a long time..then I realized he is also in the same position...like me...do you think 20 month age difference is a big problem..

reason why my parents are not approving it is...
age difference...
in my family I am the elder girl..
he is just 22 ..
he need minimum 3 years to settle...
if I gets married only my brother and sister can get married...

he is not religious...
my brother doesn't like him personally...

love is love and thats wat u need to tell ur family. tell them to shut up and let u do wat ever u want . tell them that u know wat ur doing and if u love that that person them ur fine . so wat if ur the elder child or wat ever u call it . age diffrence doesnt matter trust me . ur heart will tell u wat 2 do .

It is easy to say that love is love in the US, but not in India. I do not know what is your question, and that what rights you have in India. Maybe if the mother and father of your cousin admit you in their home than you may escape from your present home and live there, with them. But there are some dangerous points in this arrangement. So, maybe I would wait for that 3 years when your love will be a independent man. This seems to be very political, but it is not sure that after 3 years your cousin will still love you. Well, the life may be complicated and sad.

thas hella nasty