marriage is a combination of deep friendship,partnership and intimacy,which entails also physical intimacy.All of them are important for healthy foundation and successful marriage.Lack of one may be very frustrating and will undermine the relationship.Try openly discussing your feeling and relaying your frustration same way you expressed here.Maybe she needs to see a counselor as well.But whatever you do,make sure there is no resentment and regret, building up from your actions,which would eventually ruin your relationship.
All the best to you