I need you.
o bi-SO-gno di te — stress on 'bi-' and 'so-'. 'Bisogno' has three syllables: bi-SO-gno.
A vulnerable and direct expression of emotional need — said when the other person's presence is felt as essential.
'Ho bisogno di' = I need (literally 'I have need of'). Italian uses 'avere bisogno di' rather than a direct verb for 'need'. The construction is followed by a noun or pronoun — here 'te' (you, emphatic form as object).
Non me la cavo senza di te.
I can't manage without you.
'Cavarsela' = to manage/get by — not managing without them is concrete and honest
La tua presenza mi è necessaria.
Your presence is necessary to me.
More formal register but very heartfelt — necessity elevates beyond want
Sei come l'aria — non posso farne a meno.
You're like air — I can't do without you.
Metaphor of biological necessity — they are as essential as breathing
Expressing need ('ho bisogno di te') is considered a vulnerable act in Italian relationships. Italian men in particular have historically been expected to project strength rather than need. Saying this honestly is therefore a significant emotional gesture — it signals trust and genuine attachment.