It means "I love you my (heart?) are my life I adore you."
Translation: (Note, I made some assumptions about missing punctuation) If only you knew how how much I love you. If you knew that you are my everything. Maybe, then you would know exactly how much you mean to me. I love you.
mon
What does mon mean
If you mean "mon dessin", it means "my drawing"
Mon petit tresor
mon amour = my love
mon père - my father
Mon is typically the pronoun for my or mine.
To my knowledge, mon is my. Example: Comment allez-vous, mon ami?
Mon chez means my home (it should be - mon chez moi)
"mon ami" means "my friend", "mon amour" means "my love", "darling".
If you mean "mon amour", it means "my love". Pronunciation is "mo nam-mor"