L.L.
My advice would be to go slow -- for your sake and his. Going cold turkey will put you at risk for mastitis and clogged ducts if you're not careful. Also, don't think that just because he's 14 months that he's not benefitting nutritionally from your milk. Quite the opposite, so if neither of you are quite ready -- that's ok.
Kellymom has some good articles on weaning you might look at: http://www.kellymom.com/bf/weaning/index.html