1)' In such a night did Thisbefearfullyo'ertrip the dew and saw the lion'sshadowerehimself and randismayedaway '
Noun ' Thisbe ' - was a mythologicalwoman who was meant to meet her lover but saw a lion and ranaway , later her lover arrived and assumed she was killed by lion so he killed himself = tragic ending for both of them and not a happy ending for love
They're discussing tragic love stories
These could foreshadow how they will endup .
2)' Here will we sit and let the sounds of musiccreep in our ears ... and the nightbecome the touchesof sweet harmony '
Jessica and Lorenzo are enjoying spending timetogether
Audience finally get a glimpse of their relationship
They do actually like and care for eachother = good relationship and not just together out of convenience
Shakespeare may have wanted the audience to like the couple by doing this .