Sounds like you're both struggling to communicate with each other prop6and that right there is an issue for any long term relationship. You both need to be on the same level. There isn't much context to go on here but perhaps what you want from her might be making her uncomfortable thus the whole "playing dumb". You need to have a real, genuine conversation with her and about how she's feeling with everything. It could just simply boil down to incompatibility but you wont know until you have a mature and polite, healthy conversation with her. I know you're frustrated but you're both human and need to respect each other's feelings. If private conversation doesn't work and you want to make this relationship last perhaps seek counseling.
Otherwise it might be wise to cut your losses and seek new, compatible partners that are on the same page.