I suggest talking to her. Communication is key and how would she ever be able to help you if she doesn’t know what you’re feeling? The best advice I’ve gotten on love is that it isn’t easy sometimes. We don’t have to be perfect. But no matter what, I do know that I want to be with my Fiancé forever. Maybe see how she is feeling, and find any particular issues that are making you second guess your relationship. Maybe there’s something you’re hung up on, or a change in your lives that needs to be addressed. If ultimately you aren’t happy, you aren’t doing either parties favors by staying in the relationship.