Is there evidence of homosexuality in ancient Greek or Roman sources?

So what I want to know is, within ancient Greek or Roman sources, is there ever evidence of two men or women formally marrying each other, with a ceremony, and living happily ever after?<br><br>It seems like ancient Greeks were comfortable depicting male figures doing a little more than cuddling on pottery and pottery grabbers and things, but I'm curious about real-life situations, and if there ever was male-on-male homosexuality depicted in such. The same goes for male-on-male in Rome. And within both, was there a recorded instance of female same-sex marriage, too?<br><br>Thanks for reading!