You don’t need to rush this. What you’re feeling is real, but saying “I love you” for the first time is better in person, especially since you already plan to ask her out face-to-face.
Telling her over text or the phone could put pressure on her, even if she likes you just as much. Waiting shows maturity, not fear.
See her. Spend time together. Let it feel natural. When you’re sitting across from her, you’ll know when it’s right, and it won’t be creepy at all.
Love lands better when it’s said looking someone in the eyes.