Why wont my css link to my html?

<!DOCTYPE html>

<html>

<head>

<title><strong>Luke Dunford CV</strong></title>

</head>

<body>

<h2"align="left">About Me</h2>

<P>Hello, Im **** ********!<br> This is my personal wesbite containing my information!</P>

<p>Im ** years old and currently doing *** in ***. I live in *******</p>

<p>I have work experience in the ******* hotel!<br>I worked here from May 2023-September 2023 as a linen porter.

<br> My references are: ********@gmail.com<br> *********@gmail.com</p>

<h3>Leaving cert points: 550</h3>

<h5>Get in contact with me!</h5>

<p><a rel="nofollow" href="mailto:\*\*\*\*\*\*\*\*@gmail.com">Send Email</a></p>

</body>

</html>

### CSS File is

body {

background-image: url("background_pg.png");

background-repeat: no-repeat;

background-attachment: fixed;

font: 13px Verdana;

}

h5 {

color: navy;

margin-left: 20px;

}

p.one {

border-style: solid;

border-width: medium;

border-color: red;

}

p.two {border-style: medium;

border-width: medium;

}

p.three {border-style: medium;

border-width: medium;

}

I clicked save as and put them both in the same file but it still wont work