Yey! My first tab! :D This song is really simple! there's only 3 chords! :D 
It sounds best with bar chords. The timings might be a little bit out, but it's not too bad. :3 
Happy Playing! 

Intro: E        

E----------------------|
B--0-0-0-0-0-0-0-0-0---|
G----------------------|
D---2-2-2-2-2-2-2-2-2--|
A----------------------|
E----------------------|

                    E
Let me in your room
                        B
I've seen the rest of you
        A                      E
But I know there's something more in your room
                              B
I'm right outside your door
               A                  B (once)
Show me things you've never shown before


       A
A few pictures from your past
         B
And the walls you painted black
         E                   B               A
And the secrets that you keep under your bed
            B          (hold)          E
All you have to do is let me in your room


           B
You can be yourself
          A                              E
You don't have to hide from me I won't tell
        B                                     A
I know everyone you've ever trusted has let you down
                             B
And you don't want to come out
                                      (stop)
And show me, show me


      A
A few pictures from your past
        B
And the walls you painted black
        E                   B                A
And the secrets that you keep under your bed
                B                   E
All you have to do is let me in your room


A
You know every part of me
  B
I let you in, I let you see
        E               B             A
All the dark in every corner of my room
                   B
Let me do that for you
            A
And tell me all about your past
        B
Why you painted those walls black


     E                 B                A
Baby it's all right you're safe in here with me
                 B
Open up so I can see


      A
A few pictures from your past
        B
And the walls you painted black
        E                 B               A
And the secrets that you keep under your bed
        A
An open letter from your dad
         B 
A poster of your favorite band
         E                  B            A
It don't matter I'll take every part of you
               B               E
All you have to do is let me in your room
                       E
Let me in your room


End on E