Right now I only have Seamus, who I talk about as my boyfriend or fiancÚ or husband, depending. Usually I say boyfriend, sometimes fiancÚ. Husband is rarer now that we're living apart.
With Raga I said husband, and sometimes I said "my guys" when referring to both of them.
Otherwise, boyfriend and partner are the common ones. Friend for a FWB. Usually I make sure to use their names so that I go by that afterwards.
EDIT: and usually "interest" for someone I'm interested in but not with.