Yes. You have a right to marry whomever the fuck you want.
It may not be legally binding by the constitution or otherwise, however, neither is being able to eat a hamburger made out of rabbit meat.
Marriage between two consenting adults, should not be blocked by any institution.
To say otherwise is essentially racist. (yes i know its not about race, but the term fits in a general way)
Also, marraige is not a religious foundation either. That's bullocks.
Even in Islam it is merely labelled as a contract between two people. Granted the religion forbades homosexuality, so it specifies woman/man, but point is, its just a contract.
Look through history, marriage has always been a contract. A way to make a bond or pact between families, wealth, etc. Many countries/cultures still have arranged marriages that have nothing to do with love. Purely a contract between families.