So recently my friend made me download this game, I did but it doesn't let me play multiplayer at all. Please help me fix this issue.

Can you describe your problem in more detail? What steps did you do to enter multiplayer? Did it show an error and if yes, what was the error say? "It doesn't let me play multiplayer" is too vague.

To be able to play multiplayer, you must first set a GAMEpassword in your personal details page and use that together with your LFS username to unlock your LFS demo in game.

Hello!

Can you share more details so we could help you?

1. If you select Multiplayer > Display list of hosts, do you see a lot of servers? If you do not see any servers, have you changed any filters? If you have set "Private - yes", "Public - no", you might not see any on the list.
2. If you select a host and then select "GO" what happens? Do you get any error messages?
3. It would be great if you could share any details/screenshots of any errors that you might be seeing.

Did you install latest lfs version which is 0.7E?