PLEASE COMMENT YOUR ADVICE

I'm currently sitting in the bathroom close to crying because my SO decided to be like " That's why you shave your mustache " NOT ONLY DID I WANNA CRAWL IN A HOLE AND DIE BUT IVE BEEN SITTING IN THE BATHROOM OVER AN HOUR BECAUSE I DONT EVEN WANNA LOOK AT HIM RN . I didn't say anything back to him other than don't talk to me right now . We live together so like picking out an insecurity of mine out of no where makes me wanna cry . I don't even think he was trying to be nice and tell me something . Or he wasn't being playful . It definitely wasn't constructive criticism . I just felt like it was rude and mean . I am very playful and understanding so don't think I'm just over reacting guys ☹️ We've been together almost 4 years so like yeah I have bad days , I'm not perfect . I get peach fuzz . Shit . Idk I just feel like he was being a complete rude dick to me out of no where . ( THANKS FOR LISTENING IM TOTALLY ASHAMED OF MYSELF NOW ) I'm literally not leaving the bathroom till I get some type advice so please feel free to comment ):