The real point about the certificates is about pensions and financial commitments and, largely because it's played such a big part in my life last month, death. What you're really after is a certificate that says "This person is my other half; they get everything they should get in law in the event I'm not around any more and they support me just as I support them while we're both alive" (and there are many better ways of writing that too, I know, but that's a quick, inelegant version.) In other words, you want a Civil Partnership, which grants both you and your partner married rights in every respect but without the historic complexities of "marriage" (though I always call a Civil Partnership a marriage and a wedding, which it is, though not necessarily a "Marriage and a Wedding"). What's wrong is that heterosexual people can't enjoy the benefits of a Civil Partnership and that's pretty unfair it seems to me. The love part is spot on - that isn't something to which certificates contribute one iota!