I don't believe in gay marriage. I am all for having something for the gay community but I don't think it should be called marriage. I also don't vote based upon social issues like a lot of gays that vote democrat just because that candidate shares their view on gay marriage. I fell there are much bigger issues we face in America at this point. I respect if people vote based upon social issues though. Everyone is entitled to their opinion
Honestly, I felt the same way when I first came out. I've thought about it though, and to me, establishing some other institution for gays that is called something different from marriage, but presumably with all the same legal rights and privileges as hetero marriage, is a classic case of a "separate but equal" situation. Then looking at history, specifically Brown v. Board of Education, it's clear to me that having a separate but equal institution is something we've already tried and not only does it not work, it's unconstitutional.
I can certainly respect you not voting based only on social issues though. I know a lot of gays that do this as well, and certainly social issues are important but like you said, there are plenty of other important issues to be considered as well.