I would normally say to invest but 6% sucks so pay that off ASAP.
EF only needs to be 2-3 months of expenses based on the facts you gave, and invest the difference. So 2-3 * $1,500 - $2,000 = $3,000 - $6,000.
Once the loan is paid off max out all 401K, IRA, HSA options and invest anything that's leftover.
Good luck! I hope the wedding goes well.