If you can’t express your feelings to her in person, then pen your thoughts and open your heart to her. It’s really a nice idea to express to your loved one how much you love her and how her presence in your life has made everything even more beautiful. If you cannot create love quotes for her, then dedicate these lovely quotes to your sweetheart. She will be more than happy. 
1.You may hold my hand for a while, but you hold my heart forever.
2.I love you for all that you are, all that you have been and all that you will be.
3.You give me hope in my times of trial, joy in my saddest hours and love in all I do.
4.I love you and that’s the beginning and end of everything.
5.My love for you has no depth, its boundaries are ever-expanding. My love and my life with you will be a never-ending story.
6.Love is temporary insanity curable by marriage.
7.If you live to be a hundred, I want to live to be a hundred minus one day so I never have to live without you.
8.Pleasures of love lasts but a moment, pain of love lasts a lifetime.
9.If I knew I would be falling in love with an angel, I would have searched for you harder and found you sooner.
10.You’re special to me in every way. Thank you for being who you are and for letting me be myself.