Meet Julie.
Meet Bob.
I know Julie.
I know Bob.
I work with Julie.
I work with Bob.
I befriended Julie.
I befriended Bob.
I like Julie.
I like Bob.
I trust Julie.
I trust Bob.
I owe Julie.
I owe Bob.
I love Julie.
I love Bob.
I touch Julie.
I touch Bob.
I am committed to Julie.
I am committed to Bob.
I marry Julie.
I marry Bob.
None of the other words we use to describe relationships and feelings between people in the English language require a gender identifier. Why should marriage?