Commitment issues or untrue feelings?

Niki
My SO and I have been official for over 7 months now. I love him more than anyone I ever have before, however, recently I've been looking for reasons to not keep seeing him. We just went on vacation and he told me he hopes he can keep me forever,  but in the same week he said he'd never marry someone before 7-8 years of knowing them. That bugged me deeply because I want it sooner than that. I know I'm scared because I'm in so deep and will be ruined for a good while if we break up, but I feel if I were really in love I shouldn't be wanting out. Do I not love him as much as I think I do, or is it normal to have these feelings when getting serious?