@Dec25 if you say "bof" It kind of have a negative meaning to "bof" It's like saying "fifty fifty" your in-between two situation whereas allons your kind of helping someone (emotionally in this context).
@Dec25 to explain it quickly the tense use in this sentence "impératif présent" can either be : -an order like in " fait quelque chose ! "="do something!" -an advice "mange doucement " ="eat slowly" -a forbidden thing "ne joue pas avec la nourriture" ="don't play with food" It's exactly the same as English so don't worry to much about it, you will know by the context. So in this one you can use allons It's even better because you use the fact that the tense is about an advice so that's good. "Imperatif présent" is easy to recognize because it looks a lot like present but you just don't have pronoun (in French pronom personnel) relate to this verb. You will never see those pronoun with the verb : Je, Tu, Il/Elle/On, nous, vous, Ils/Elles