Runaway

'Highways flew by Run, run, run away'

• Highways like unending

'No sense of time'

• no definition of difference or reality, she remains feeling the same

'Want you to stay Want keep you inside'

• wants to keep her feelings/memories of him, even without necessarily showing them

'Want you to be my prize'

• wants to win his love or for him to come back to her

my interpretation basically is wants her ex back or the guy she perhaps ran from but still loves after much time.