Advice from a few sources, including my shamanism teacher and anotehr metaphysist: in affirmations, consider the simplistic, subconscious reaction to words when choosing affirmations.

For example, instead of "I am losing weight," try "I choose to be thin." But ex., in Russian, there is a homonym for "thin" that has negative connotations. Maybe "My body is lean."

The other suggestion is to make the affirmation in the present tense, and feel the reality of that statement. Say "I am lean" vs. "I am becoming lean". Else the subconscious thinks, "Oh, not lean yet."

Actually my teacher suggests the word "choose". I choose for my body to be lean. I choose to be thin.

As for the word "want". He says, "Who are you to want?" I loved when he said that! As Jesus said, "You are gods."