What does the speaker in this poem say will happen to "thy thoughts, when thou art gone"?

music, when soft voices die (
by percy bysshe shelley

music, when soft voices die,
vibrates in the
odors, when sweet violets sicken,
live within the sense they

rose leaves, when the rose is dead,
are heaped for the beloved's bed--
and so thy thoughts, when thou art gone,
love itself shall slumber on.

the speaker will forget them.

the speaker will repress them.

they will live on forever for the speaker.

they will sicken and sadden the speaker.