Sorry for the late reply Hero.
I actually agree with SmoothOp. I know you love her and everything, but the fact is, at your age, it's probably gonna end at some point. If you're pressured to commit, it's just gonna shorten the life span of that relationship. These early relationships are a learning ground anyways.
If you wanna give the relationship a shot, then do by all means. Nobody can decide that for you, I can only tell you how I view those things now, about 10 years later in life.
I have very mixed feelings about my earliest LTR, from 20-23. This was my first love and I thought I'd never ever find a girl who will love me like her and would be equally big-breasted

I did of course, not much later. On one hand I somewhat regret I missed out on a lot of college life, on the other hand it was a good learning experience for later. But if you asked me would I do it again, the answer would be NO.
I would have rather chased every cute girl and just enjoyed myself. I have to do it now when I'm 30 lol. Another thing I noticed, this isn't a rule, but I notice it in my friends too, is that later in life it's more difficult to fall for someone head over heels as you do when you're younger. I don't know if this is the effect of being a part of the PUA community, but very few, really very few girls make me feel that way. When I was younger I would move mountains for love, I miss that feeling.
However, if you have to ask yourself if you want to commit, I'd say the answer is obviously no. You're in a comfortable place, receiving regular attention from her and you like her a lot. My estimate. But if you loved her to bits, as you say, you wouldn't have to think twice, actually this thread would never have happened, because you would have been moving mountains and thinking you were gonna marry her someday.
I think you're just very comfortable with the situation, not being in too deep, maybe you've closed the door for other girls and wild college life, but you're keeping the window open.
So what now? If you break up, will it feel like the end of the world? Maybe for about a week. But it gets really awesome after that. Don't be afraid to lose this girl because you think there will be no other or because you don't want to lose her as a person, you guys can be friends later, it's possible if both of you are normal people.
If you do feel you would move mountains for her, then do it! It will be a great ride, you'll learn a lot, experience a lot. If it's not how you feel, then find a girl for whom you'll feel that, it's awesome.
In any case, if you stay in or get out, there will be good moments and bad, pleasure and some pain too, but that's what makes life fun. Awww I'm so romantic today, must be ovulating.
Good advice once again! I've sat back for a few days, hence the long wait for replying, to think about things. You nailed it on the head when you said I'm comfortable. I am but I think she's pushing for more and more as you said. She is talking about moving in together in a years time. Woah!!! I'll be 20 and all tied up...
I love her to bits and it's gonna kill her if I break it off. I'm going to take it easy the next few weeks. See how I am feeling but I know it's just gonna be the same routine. So should I speak to her?
Would you recommend I express how i'm feeling. As if things are going a little too fast? How would that go down? (not well I expect)