Don't be stuck on trying to find an 'eloquent, non-crazy or overwhelming way' - just speak your heart out. If he cares for you to the extent you care for him, he will be there to listen to you and support you. If he doesn't, this is an indication that you need to re-evaluate the relationship and see if it is truly worth it. You need to get yourself out of the pattern, otherwise it will just continue to hurt you.