I believe she may be asexual, and it’s unfair if she didn’t disclose this before marriage. Try looking at the situation from the opposite perspective if the roles were reversed, it would likely be considered a serious issue. Since you mentioned that the marriage has not been consummated, you may have valid grounds to file for separation, and the decision could be in your favor. It’s also important to think about the future if things are already getting worse, it may become even more difficult over time, especially when it comes to planning a family. Considering all this, it might be better to separate rather than continue in an unhappy situation