First of all I'd like to say that it sounds a little off here and there so tweak it if you must.
I think that once you get the strumming pattern sorted you'll be fine.

Capo: None
Verse 1:
          C D   G Em
There's a boy I know
               C    D    G Em
He's the one I dream of
       C D        G Em
Looks into my eyes
                  C D       G Em
Takes me to the clouds above

Verse 2:
        C D    G Em
Ooh, I lose control
              C D      G Em
Can't seem to get enough
        C D       G Em
When I wake from dreaming
               C   D      G Em
Tell me is it really love

Chorus:
             C  D  D  Em
How will I know?
         C  D  D  Em
(Don't trust your feelings)
             C  D  D  Em
How will I know?
             C  D  D  Em
How will I know?
         C  D  D  Em
(Love can be deceiving)
             C  D  D  Em
How will I know?
C           D      G          Em
 How will I know if he really loves me
C         D           G          Em
 I say a prayer with every heart beat
C           D        G       Em
 I fall in love whenever we meet
C            D               G          Em
 I'm asking you 'cause you know about these things
C           D       G            Em
 How will I know if he's thinking of me
C          D             G        Em
 I try to phone but I'm too shy (Can't speak)
C            D       G          Em
 Falling in love is all bitter sweet
C              D            G         Em
 This love is strong why do I feel weak

(Repeat throughout song)

lyrics are from elyrics.net