is it normal to date someone thats younger, part two

so if you havent seen my last post, i was just asking if its ok for me, whos turning 14 on the first and is an eighth grader can date a twelve year old thats in seventh grade. I now have an update for my last post as i just found out that she has been lying to me since we started talking and that she is actually in sixth grade. I dont think that this is a good basis to keep a relationship going on, and it feels wrong to date someone thats two school years younger than me and i didnt even find out from her, i found out from my sister who is friends with her. I need to know what to do as im not sure right now. ANY advice is helpful advice