Need help' kyle

Hi. I have recently restart to play Kyle, because i think she can be very tactical. It's what i have noticed. But my problem is : when it's very important to push the lane, it's hard for me to escape. (Late game) Should i escape or let the tower at a very very low life point ? Yes i will be fucked up, but the tower is destroyed. Should i keep this in mind ?

(Sorry for my bad English !!!)