ROM?

he called me today and i was surprised wat he said to me... he said we go ROM next yr & i went blank in my mind... duno how to react.. not that i dun wan to marry him, its juz that too sudden to bring up this topic! he said we shall go ROM next year, feb & that is only 3 months away from now! duno leh, very confused & uncertain. i did said that he will be my last guy from now.. but the problem is we still facing alot of relationship problems!
his parents are ok, my dad & aunt are ok but the main problem lies with my mom if we really want to ge together... my mom dun like me to e together with a younger guy, she is juz too conservative... he asked me to ask my mom but i duno how to start...