Gay people are free to marry whoever they want. They can have a big party. They can invite all their friends. It’s no one’s business but their own.
And like it’s no one else’s business, no one is under any obligation to bake their cake, deliver pizza, or anything else.
The Federal Government is however out of the marriage business altogether. Ceremonies may be performed by obliging federal employees, but this conveys neither sanction nor benefit. As of now there are no tax deductions for filing as a married couple, whether straight, gay, or merely confused.
What’s love got to do with it? Everything. What has government got to do with it? Nothing.