Yes, the misplaced modifier in the sentence is "almost." It should be placed immediately before the verb "decided" to clarify that he came close to making a decision. The revised sentence would be: "He decided to eat almost half the pizza for supper."
"My boyfriend made it clear why we were breaking up on Monday." Is there a dangling modifier in this sentence
No, there is no dangling modifier in this sentence.
"My boyfriend made it clear why we were breaking up on Monday." Is there a misplaced modifier in this sentence
No, there is no misplaced modifier in this sentence.
"The paint job that they did yesterday is not dry." Is there a misplaced modifier in this sentence
No, there is no misplaced modifier in this sentence.
"She only liked frozen strawberries." Is there a misplaced modifier in this sentence
Yes, the sentence "She only liked frozen strawberries" contains a misplaced modifier. The word "only" is modifying "liked" instead of "frozen strawberries." A better way to phrase this sentence with the modifier correctly placed would be: "She liked only frozen strawberries."
"The doll belongs to my cousin whose head is missing." Is there a misplaced modifier in this sentence
No, there is no misplaced modifier in the sentence.