You have the right to Marry.
You have the right to marry for whatever REASON you may wish to marry someone.
You do not have the right to "Marry the person we love".
If you love, romantically love, your sister/brother/cousin of the opposite sex, you can't marry them.
If you love, romantically love, someone under the age of consent or someone over the age of consent when you're under the age, you can't marry them.
If you love, romantically love, someone who doesn't agree to marry you you can't get married to them.
On the flip side, you can absolutely and without question marry someone you DON'T love.
People have the right to marry. No one has the specific right in any way shape or form to "marry the person we love". They may have the ability that, if the situation is correct, they can end up marrying the person they love. But it is not a RIGHT that is somehow universally extended to straight people.
Individuals on both sides so often bring up the non-relevant and emotional based argument of "the person you love" into the conversation. It's irrelevant. There's a fundamental right to marriage that's been defined by the courts, however there is no fundamental right to "marry the one we love". The argument is one that needs to cease being made in these kinds of stations because it is not one that in any way is factually based nor a worth while argument as to why same Gay Marriage or Same Sex Marriage should be legalized.