How long was it before you realized you were in love with your significant other?

I’ve only been seeing this girl for a few weeks now, but already I have these feelings that I haven’t had for anyone else I’ve dated before.

I don’t want to start dropping the “L” word too soon and freak her out. I feel as though I’d be able to reciprocate the feelings if she said it though.

How long did it take you to realize you were in love, and felt comfortable using the phrase “I love you”?