How To Make My Girlfriend Cry Happy Tears?

Tell her that she is your reason for living and for getting up in the morning, that she completes you, that you were gazing at the stars and matching each star for a reason why you love her and you were doing great until you ran out of stars, that you sent an angel to watch over her while she slept and a minute later the angel returned and when you asked why it replied that angels don't watch over other angels, that she is your life your love and your (insert her name), that you need her more than air, etc.

tell her you love her pick up her hands and put them on your heart and say you will never let her go and then kiss her lightly
that would make me cry happy tears

Honestly just tell her how you really feel, I mean from the heart, and make her know you mean it because if she doesnt know that then it literally means nothing at all.  These are things I do and they work like crazy, I make her cry almost every weekend, happy tears that is, maybe I'm just that good I don't know.

Say words can not describe how beautiful she is

First find out who was very dear to her in her family whom she had lost, now tell her in her eyes that you yourself have come up in her life ready to take that position of that loved one whom she has lost, I bet this will work.

"I love you" >.<

Just tell her that she means the world to you and you never want to lose her and you love her with all of your heart

Just be honest, say what it is you feel and even if you find it hard to express yourself, I'm sure she will understand

Tell her that you don't usually love girls that much but she is one lucky girl that you give all your love to I told mine and she said she was crying