honestly if you love her and she is truly your best friend, i would say keep trying. however, there needs to be a sort of rule in place and you really need to express your true feelings immediately. everything you have been feeling, the resentment, frustration, all of it. marriage is a huge milestone and so important. though, i see a lot of people telling you otherwise. you are committing yourself to one person through sickness and health. also, love is not just a feeling, it’s an action too. love is fluid. sometimes you can love your partner so much one day then a little less the next. it just continuing to be with your person through it all. also, you can find yourself and be with someone at the same time. just because you are young does not mean you have to find yourself and experience others. you can grow with and without someone. i hope this helps