Issue connecting my index.html with .css

I have a custom domain with namecheap joshua-abbott.me and an index.html all which work just fine. The problem is that I cannot seem to get the index.html file to properly connect with my other source files such as the .css, other pages, and images. I have all of the files on the same repository and branch (gh-pages).

 I’m fairly new to github and gitpages, and I’m sure that this issue is right under my nose but I can’t seem to figure it out. 

Below is a snip of my code, is there anything wrong with my hrefs?

Nevermind, all I needed was to get rid of the backslash lol…