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私はあなたが大好きです
I love you deeply
To have deep affection or love for someone or something
彼女は猫が大好きです
She loves cats
彼は音楽が大好きです
He loves music
Often used to express strong personal affection, stronger than 好き (suki)
Use 大好き to express stronger affection than 好き.
While often romantic, 大好き can also describe deep affection for non-romantic things (e.g., hobbies).
From 大 (dai, 'big') + 好き (suki, 'like/love'). The 'big' intensifies the affection.
More intense than 好き (suki). Often used for romantic love or deep personal affection.