help me find a poem

I'am a chinese student ,I am not good at english .Recently We are assigned a homework to design a lesson plan which is to compare two english love poems ,which tell about sadness and sweetness respectively. I've found "The Widow's Lament in Springtime"(as shown below) but can't found the other one which is supposed to be similar in the background but different(opposite) in mood . Could you introduce some poems to me ?help me!

The Widow's Lament in Springtime
Sorrow is my own yard
where the new grass
flames as it has flamed
often before but not
with the cold fire
that closes round me this year.
thirty five years
I lived with my husband.
The plum tree is white today
with masses of flowers. ?
masses of flowers
loaded the cherry branches
and color some bushes
yellow and some red
but the grief in my heart
is stronger than they
for though they were my joy
formerly, today I notice them
and turned away forgetting.
Today my son told me
that in the meadows,
at the edge of the heavy woods
in the distance, he saw ?
trees of white flowers.
I feel that I would like
to go there
and fall into those flowers ?
and sink into the marsh near them

http://www.poetry-archive.com/w/the_widows_lament_in_springtime.html

there you go!