I can see why she flipped out, just because I've been with enough girls to know that's a natural reaction for them. Personally though, I don't see a problem with it. You're young, she's young, you haven't even lived 1/4 of your lives yet. I haven't told anybody we were "meant for each other" or that we would "be together forever" since I was in high school, cuz no matter what you feel for that person, you're just not sure. Maybe when I'm 50 and I've passed the point of no return (because face it, at that point, your hair's not gonna grow back
, your gut's not gonna get smaller
, you're just... done) I might change my mind. Because then I'll want to hold on to the last woman stupid enough to agree to have sex with me, before that well runs completely dry.
My longest relationship lasted over 4 years, and then one day it just ended. No hard feelings, no infidelity, just... "Well, it's been fun. Later!" If you want to feed her the lines just to make her happy, you could do that, but I prefer honesty in ALL facets of the relationship. If my girlfriend asks me if I think we'll be together forever, I just say something like "Well... I mean I like you NOW. As long as you don't get fat, go crazy, or bang some other dude... I mean, yeah. Anything's possible."
PS - Amy and all the other girls here... please don't hurt me.