"Do we have to have the same number of bridesmaids and groomsmen?"
Nope! While even wedding parties are traditional (and make that arm-in-arm walk down the aisle a little easier), there’s no rule saying you’ve got to have the exact same number of people standing on each side of the altar. For an uneven wedding party, have two bridesmaids walk down the aisle with one groomsman, or have an extra groomsman walk solo at the beginning of the processional. You could also have the men and women process separately if you’re unsure how the groupings will look. Consider setting out seating or lounge furniture for the wedding party to sit on at the altar, which will mask a big difference in numbers, or have a mix of bridesmaids and groomsmen standing on each side for a more even split, regardless of how many more men than women there might be.