I'm a Hindu but just like, so much yes.
Even if (and I think this is also messed up) you think that same-sex marriage goes against your personal religious convictions, you can still support it. Here's an interesting article by Mehdi Hasan -
As a Muslim, I struggle with the idea of homosexuality – but I oppose homophobia
Earlier today I crunched the numbers, and found that 1,108,222,806 people live in countries where same-sex marriage is established in law. Note this includes Finland, in which the law does not come into effect until later this year, and all of Mexico, when actually while same-sex marriage is recognised nationwide it can only be routinely performed in certain states, and the federal district.
On the map below, the dark blue areas are where it's performed, the yellowy-brown areas are the ones where there have been at least 5 court orders for the state to institute it (basically couples have sued the state and been married by the courts, and the courts have ordered the state to legalise it) and the sandy ones have had 1-4 court orders.
https://upload.wikimedia.org/wikipedia/commons/2/23/Same-sex_marriage_in_Mexico.svg
My bet is on Taiwan being next - it's projected to be made law in March or April, although we're not 100% when it'll come into effect following that.