Main Part:
----------------------------------------------------------------------
----------------------------------------------------------------------
-666-444-444-444------------------------------------------------------
-666-444-444-444-777-777-666-444--------------------------------------
-444-222-222-222-777-777-666-444--------------------------------------
-----------------555-555-444-222--------------------------------------
(play twice at the beginning and three times after the long chord)

So you finally fessed up to her...
----------------------------------------------------------------------
----------------------------------------------------------------------
-6--------------------------------------------------------------------
-6-----777-777-666-444------------------------------------------------
-4-----777-777-666-444------------------------------------------------
-------555-555-444-222------------------------------------------------

Chorus: Trying to give you summer...
----------------------------------------------------------------------
----------------------------------------------------------------------
-9-9-9-9---4-4-4-4-------------11-11-11-11----------44-4-44-6---------
-9-9-9-9---4-4-4-4---7-7-7-7---11-11-11-11----------44-4-44-6---------
-7-7-7-7---2-2-2-2---7-7-7-7---9--9--9--9-----------22-2-22-4---------
---------------------5-5-5-5------------------------------------------
(play chorus twice, then play the end of the chorus and go back to the
beginning)

The part that leads into and during: Wish I could make you spring...
----------------------------------------------------------------------
----------------------------------------------------------------------
-44-4-44----------------------------------4-4-4-4-4-4-4-4-4-4-4-4-----
-44-4-44----------7-7-7-7-7-7-7-7-7-7-7-7-4-4-4-4-4-4-4-4-4-4-4-4-----
-22-2-22----------7-7-7-7-7-7-7-7-7-7-7-7-2-2-2-2-2-2-2-2-2-2-2-2-----
------------------5-5-5-5-5-5-5-5-5-5-5-5-----------------------------

In general, this is a pretty easy song. It is almost exact.
Just listen to the song.
You'll get used to the way it is played.