is opening up about why he and his longtime partner, David Burtka, have yet to tie the knot despite their long engagement. In a recent interview with Details Magazine, the 38-year-old said, "It's complicated," before explaining, "David proposed to me five and a half years ago in New York on the same street corner where we met."
"The following year on Valentine's Day in Santa Monica, one of my gifts was a ring and I proposed to him," he continued. "Then, when the marriage-equality stuff was on the tipping point in New York, where we have residency because we have an apartment there, it seemed my responsibility to at least tweet about it - to say, 'Please vote for marriage equality in New York, it would be nice to get married someday.' "