Learning SQL: Rather Difficult Query Needed: And If You Know This With Explanation What You're Doing If Possible :)

If you know the answer please explain what you're doing if possible, that'll help me :)

I have the following tables:

CREATE TABLE [dbo].[tblUserData](
    [UserCode] [int] IDENTITY(1,1) NOT NULL,
    [UserName] [nvarchar](50) COLLATE SQL_Latin1_General_CP1_CI_AS NOT NULL,
    [DisplayName] [nvarchar](50) COLLATE SQL_Latin1_General_CP1_CI_AS NULL,
) ON [PRIMARY]

CREATE TABLE [dbo].[tblFriends](
    [UserCodeOwner] [int] NOT NULL,
    [UserCodeFriend] [int] NOT NULL,
    [createdate] [datetime] NOT NULL CONSTRAINT [DF_tblFriends_createdate]  DEFAULT (getdate())
) ON [PRIMARY]
in tblFriends relations are stored twice, so for a relation between user 5 and 6, there will be 2 rows: 5-6 and 6-5

Now, I want to get the columns (UsercodeOwner,UsercodeFriend,createdate,username,displayname) for relations that were created in tblFriends in the last 10 days for the FRIENDS of a person with usercode 5.


Example:
tblUserdata
5 peter Petertje
6 john Johnny
11 simon SimonSays
15 monique Montje

tblFriends
5 6 'createdate 30 days ago'
5 11 'createdate 5 days ago'
6 5 'createdate 30 days ago'
6 11 'createdate 3 days ago'
6 15 'createdate 7 days ago'
11 5 'createdate 5 days ago'
11 6 'createdate 3 days ago'
15 6 'createdate 7 days ago'

The resultset for a query on usercode 5 would now be (usercode1, username1, displayname1,usercode2, username2, displayname2,createdate):

6 john Johnny 11 simon SimonSays 'createdate 3 days ago'
6 john Johnny 15 monique Montje 'createdate 7 days ago'

As you can see each relation is only returned twice even though there are always two entries

What would be the SQL statement, if possible without temp table..

Thanks!