Good for you, chicago.
Want my best advice?
Don't tell her you feel this way until at LEAST ... like ... the day you are putting the ring on her finger.
And I know all the females are gonna jump on me for saying that but ... bro ... trust me on this. Don't hand your power over to them.
BTW, I'd say the exact same thing to a girl talking about a guy she just met, so ... it's not about gender, its about PEOPLE.
Wish it were different, but hey ... it is what it is.
Anyways, ENJOY that feeling to the fullest, it is great, isn't it? But ... if you really NEED to tell someone about having it? Tell your mom...