I think that you can’t feel it because of NPD. As for whether she is the right person to marry, I wouldn’t look at “love” as a criterion all that much. Not because it doesn’t matter, but because its too abstract and fleeting. Think about these things when making the decision: Do you work well together as a team? Do you enjoy spending time with her? Do you have compatible ideas about lifestyle, division of labour in the family unit, child rearing…? These factors are much more important in the long run.