By having a good life apart from her, and working on your daily goals.
Have ambition, and goals in your life, and especially hobbies.You HAVE to have a Mission plan in your life , and stick to it.
In other words, have a life outside of your relationship.
Your 'butterflies' might just be an immature reaction to those feelings you're not used to, it also is a little bit of being 'in love with love' or the feeling of love, not her necessarily. So it's not bad, but be careful of letting it override your rational thought processes,and values. (while personally I think its more acceptable for women to feel this, I dont think it helps men to go this overboard. Men have much more to lose unfortunately. As a man we kind of have to be the leader, and the compass, so it really doesnt help attraction when we lose our center and our persnal direction in life. But for women it seem to usually work out fine..In fact, I think a guy is lucky for a woman today to feel that way about her man...A lot of women think men are 'dogs and pigs'.)
She can't make or break you, and can't fix all your problems. She also is a human being, and imperfect.Dont look at her as your new 'toy'.
She's a female. And has her own beleifs and limitations, and humanity.
Later on as we mature, the way we feel our love for our partner changes, and it becomes much much deeper than 'butterflies'.
Especially when you really admire and are inspired by your GF. The 'butterflies' stage is usually infatuation, not necessarily love. Love is really going as far as taking care of her when shes sick, or protecting her, and siding with her when when one of you are forced to 'choose sides'etc etc. So stay grounded with her, look at her as a human being, not something supernatural. Keep working on your personal goals and ambitions. Keep doing your hobbies!!!
And admire her, and be appreciative you found a woman that impresses you so much.
PS You ARE in a relationship, right?
If not, you better pull the needle out right now. You may be developing Oneitis.
Be very very careful from here on out.....