请问一下恋人之间写信时想要说“我希望能用我的真心与你交换”这句话，用英语该怎么说？

Since we said good-bye

I wake up thinking of you

I day dream about your belly button

I long to run my tongue down your spine

I contrive a thousand reasons to call you

I stop myself from calling you

I fall to sleep thinking of you

just want you to know that i am gotta love you with all my heart.
and hope to get some feedback too

heart to heart

I hope I can change my true heart with yours.