You make me a better person.
Don't worry, I totally feel your struggle.
I feel so lucky and honored to be in love with you with all of my heart.
I miss you, my darling.
You do not have to be a great poet or writer to appeal to him, merely expressing your true feelings and telling him things you find adorable about him will suffice.
Get ready for some serious swooning.
Thank you for your love.
These few words hold mighty importance to many men and make a great compliment for boyfriend.