Only my opinion.
Marraige is not about a special bond. That bond will exist whether an arbitrary legal cerimony solidifies it or not. I have known many couples that were never married and have more than 20 years together. I have known many married couples that had three years get a divorce (myself included).
The trick is both people hold and believe in each other. They understand each other. Not only mentally, but everything. Faults and all. Indeed the faults a partner has are held as what makes them unique and special. A specialness that is desireable and admired by the other.
If your partner is as not smart, wealthy, or talented and hold them as such the marraige is doomed to failure. Because as smart, weathy, or talented as you think you are, there is somebody on this planet that are smarter, wealthier, or more talented that you. Instead of focusing on shortcomings, focus on the positive level they reach in those standards and accept it; even embrace it. There is always room for growth together. There is where the magic of marraige lies. Growing together. If one decides they out grow, the marraige is doomed.
Because of this attitude I have come to the conclusion that yes, gay people can be in a marraige. Marriage is not about gender. It is about two people appreciating each other and growing together. With NO DOUBLE STANDARDS held in the idea they are family. Held in the idea regardless of what life throws at them; they have and will always have each other. I was raised Roman Catholic BTW.
But if the marraige is born from the wrong reason. Rent must be paid, cost of living, "it is just time," somebody wants a child before 40, somebodies mom keeps yammering in the ear for a grandchild, convinience, blah, blah, blah; expect it to fail.
Talk about what you want from it, both sides, before hand. In honesty anywhere from sex to who does the dishes. Just do it before. Don't start demanding the understanding be changed after the fact. This will only breed resentment and its eventual failure.
I am "so super cerial." I have also known people that stay in a marraige under the notion they made a promise or have kids, except they hate each other and cheat. They also make the kids life a miserable hell in daddy/mommy loves you more.
If what ever gender you are attracted to has a person you can say, is your best friend, love, indeed makes loves to, and can't imagine life without...marry them only so long as they feel the same and it is not about convience. Make sure it isn't under some pressure. Till we as humans die, time is all we have. There is no need for pressure.
For the record I am straight and male, I love women. But I am also divoreced. All the ways to ruin happened to me. I have learned a real marraige of family and love should not be denied to anyone regardless of gender preference. If two people can just "get" each other and hold it forever, I am happy. It is what I long for, was promised and denied. If two gay people can do it, I don't care.
Never do it because it is the next "step." Assembeling furniture has next steps. Relationships don't.