Adding posts to the feed where user friend's posts and user's posts in it

[Nunix]

I am trying to put a post feed on the homepage but I am with difficulties on it. I think my query it might be wrong, but I want to pick the username from 'blabs' table and see if that 'username' from the same table is the user or the user's friends.
So to be clear, what I want is to add this 3 tables from db:

• users (to pick the profile picture, which is recorded as 'profile')
• blabs (to pick all the info from it: username, blabs and date)
• friends_request (to check if in 'blabs' table is their friends)

My php script for this content is:

<?php

    if(isset($_SESSION['username']) === true) {

        $friendFeed = "SELECT fr.username, u.profile, b.username
        FROM (select from_username AS username,
        username AS busername 
        FROM friends_request, blabs
        WHERE to_username = '$user' AND accepted = 1
        UNION ALL
        SELECT to_username = '$user' AS username,
        username AS busername
        FROM friends_request, blabs
        WHERE from_username = '$user' AND accepted = 1) AS fr 
        JOIN users AS u JOIN blabs AS b.username = fr.username";
        $resultFeed = $sql->query($friendFeed);
        if($resultFeed->num_rows == 0) {
            echo "There are no posts from you or your friends.";
        } else {
            echo '<table>
                    <tr>';
            while($rowFeed = mysqli_fetch_assoc($resultFeed)) {
                    $t1 = $rowFeed['username'];
                    $profile = $rowFeed['profile'];
                    $blab = $rowFeed['blab'];

                    if(!empty($profile)) {
                        $profileView = "<img src='".$profile."' width='auto' height='155px' />";
                    } else {
                        $profileView = "<img src='images/no-picture.png' width='auto' height='100px' />";
                    }
        ?>
                    <td>
                            <a href="profile.php?u=<?php echo $t1; ?>" class="no-style-friends">
                            <?php echo $profileView; ?><br />
                            </a>
                    </td>
                    <td>
                            <a href="profile.php?u=<?php echo $t1; ?>" class="no-style-friends">
                                <?php echo $t1; ?>
                            </a>
                    </td>
                    </tr>
                    <tr>
                        <td>
                            <?php echo $blab; ?>
                        </td>
                    </tr>
        <?php
            }
        }

    } else {
        echo "<h3>Welcome to {WEBPAGE NAME}</h3>
    <p>{Description}</p>";
    }

    ?>

I want to do this so the user, when it's logged in can check his friend's posts and see what's new on it.