Obviously, there is so much more to a happy marriage than spending time together at your wedding. But metaphorically speaking, couples who are able to prioritize spending time with each other on a day filled with so many potential distractions are setting a healthy precedent for their future.
If a family member or good friend asks for a moment with you or your spouse, grant them your attention but stay close with your spouse and remain together. If a bride and groom separate during the party, however briefly, it may be more difficult than one would expect to break away from subsequent conversations and find each other again.
Remember, your friends and family are coming to your wedding to wish you well in your new life. If they do not get tons of quality time with you on this special day of celebration, they will surely understand!