How am i supposed to know?

Sami
I am 16 and with my first boyfriend. We haven't been together long (3 months ) but our whole relationship has gone fast. I had a dream last night that he told me he loved me and i said i loved him back. Does this mean i do love him? Im not sure how im supposed to know. Advice?!? I just want to read for you ladies some of the ways you knew.