You want to redefine marriage, but by the current definition there is no inequality. You are as free to marry as anyone else.
Your desired redefinition is stupid for two reasons: 1) The obvious biological and social dynamics of heterosexual reproduction. 2) The entire first world has shared a common definition of marriage whereas those places with weirder norms are all shit holes. It's a proven institution and fucking with it is a dangerous slippery slope. This is not about mean religious crazies who want to make you sad. There's a lot more at stake when you go tinkering with this stuff.