Iwandered lonely as a cloud
that floats on high o'er vales and hills,
when all at once i saw a crowd,
a host, of golden daffodils;
beside the lake, beneath the trees,
fluttering and dancing in the breeze.

there were so many daffodils that it looked like a crowd of people at a party.

wordsworth felt as lonely as a cloud does when it floats and has no direction.

wordsworth was lonely and on a walk when he came across a field of daffodils.

the daffodils were next to a lake and underneath a tree, blowing in the breeze.