It's been three days since we first started talking and I feel really guilty. I know he'll probably be upset and most likely not want to talk anymore since it's an 8 year age gap and obviously a 24 year old man being friends with a 16 year old girl is really, really weird. I just don't know what to do, it's not like we flirt or do anything, we just talk about anime and tv shows and stuff. I just don't want to lose him because he's a really good friend but the guilt is also eating at me

Should I just keep up the lie that I'm 18 and see if our friendship eventually fades out? Should I just tell him?
Thanks in advance!