Eye,
Saying "I Love You", is too final... In other words, don't say it until you are sure you mean it and only if you are sure she truly loves you too...
Best things to say are:
I like being with you, I like when we're together, I enjoy your company a lot, etc. Let there be something for her to look forward too as your relationship continues...
"I Love You", only lets her know she either already has you or that you are an idiot... There is a lot of investment to make and receive before you use those words or hear them yourself... All of us who hear these words too soon wonder, what's wrong with this person? Your deeds should express your feelings more than your words...
Treat her with dignity and respect and keep it light... Let the relationship grow, sloooowly... Don't push it or it won't be what you want... Let the relationship develope itself, it will, you know... So, give it the time that it needs...
I know, you're intense and some other part of you is doing a lot of the thinking for you... Don't let it! Be smart, most women fall for smart men who aren't too eager to be with them... This is a big turn-off for women, (clinging men), actually I should say the same for both genders... Let there be some mystery and expect some mystery back... Otherwise, about a month or two from now, your next letter to the forum will be:
Please, someone help me get back with my girl... She, of course, will be with someone else...
I think you get the picture, don't you?
Regards,
PS Remember, luck has nothing to do with it, it's all you!