i know too...

Forrest Gump: Will you marry me?

[Jenny turns and looks at him]

Forrest Gump: I'd make a good husband, Jenny.

Jenny Curran: You would, Forrest.

Forrest Gump: ...But you won't marry me.

Jenny Curran: [sadly] ... You don't wanna marry me.

Forrest Gump: Why don't you love me, Jenny?

[Jenny says nothing]

Forrest Gump: I'm not a smart man... but I know what love is.