First day of school

So I have it in 2 days and I’m nervous but at the same time I wanna look good asf Ik people say that you shouldn’t impress people or ex’s but like.......THATS WHAT I WANNA DO! So lemme tell you why.....[me and him had been dating for 1-2 months and he kept hanging out with his “fake sister” literally EVERYDAY so I had told him one day that I couldn’t do it anymore and he started crying like a BABYYY!! So after the 1st break up me and him got back together 1 week later🤦🏽‍♀️so I was telling him everything that I didn’t like about E(ok let’s call my ex G and the girl E) ok so like 20 hours goes by and E texts me saying that she can’t live without G and that she wanted me and her to be cool so I was like sure I’ll give it a try so then the next day I go and look at her snap story and tell me why they are at wet and wild together😐 I was so mad so I text G and was like oh so you have time for her but not me so then like 2 weeks go by and I tell him I’m officially done and now them two are dating🤣🤣🤣] so yeah that’s why I wanna look good because I wanna show him what he is missing✌🏽soooo any ideassss??? COMMENT PLEASE I only have 2 days