I am having a 25th anniversary party/vow renewal in March. It will be similar to a wedding reception in that we will have cocktail hour, sit-down meal, open bar and dancing. I am in the process of getting my invitations ready to mail and have a question. My friend has a fairly long term on/off relationship (they were living together but are not any longer yet they are still dating). I know her SO pretty well but he would not, on his own, be on my guest list. When addressing my friend's invitation, would it be proper to address it to "Friend and guest" in case they are "off again" by March?