124 well, do not swear. although i joy in thee,
125 i have no joy of this contract to-night.
126 it is too rash, too unadvis'd, too sudden;
127 too like the lightning, which doth cease to be
128 ere one can say 'it lightens.' sweet, good night!
129 this bud of love, by summer's ripening breath,
130 may prove a beauteous flow'r when next we meet.
131 good night, good night! as sweet repose and rest
132 come to thy heart as that within my breast!

what concern does juliet express in lines 124-132? what hope does she express?

Juliet asks Romeo to be calm and she hopes that her love for Romeo will grow larger when she meets him the next time

Explanation:

The scene is said to be the balcony scene whereas Romeo is confessing about his love to Juliet and Juliet in these lines asking him to be patient and calm. She says they are not sure though he brings joy to her and promises that their love grows big when they meet for the next time, and when he asked for her confirmation she says him to wait, and not to be like lightening as it comes and fades away before saying. But she wants her love to be grow big when they meet and says good night and leaves. These are the concern of Juliet in these lines