I can’t get into my messenger

Okay, so this is going to sound pretty silly, but I bought this ASUS laptop yesterday at my school and while I was repairing my old laptop, my boyfriend set this new one up. Upon putting my e-mail address in for the messenger and people apps, he put it in wrong. He then tried to fix it by creating me a new e-mail with that address. I used that e-mail he created to change the app to MY e-mail, but it wont work. So, I tried to use my boyfriend's e-mail and it says that he doesn't have one, but it is now set to his "e-mail" without a darn password. Those apps are pretty much locked and I can't do anything to them. I hope this isn't too confusing. I'm at my wits end! LOL!