In making its determination, the court shall take into consideration the following factors:
(a) Whether the parent of the minor consents to the proposed emancipation;
(b) Whether the minor has been living away from the family home and is substantially able to be self-maintained and self-supported without parental guidance and supervision; and
(c) Whether the minor can demonstrate to the satisfaction of the court that the minor is sufficiently mature and knowledgeable to manage the minor’s affairs without parental assistance.
From:
Oregon Emancipation of Minor Law - Emancipation - Minors
Obviously a) and b) don't apply. And c) is questionable. So, if you don't want your boyfriend to be jailed for a long time. I would be nice to mom and dad, finish school, wait until you are 18 and, if the boyfriend wants to marry, then, go ahead.