Most witnesses I knew got married right out of high school.I was married to an elder (I got married before I was 18 to a guy age 28)...I would have left earlier than I did, but I didn't know what I would do.
That is so sad for people raised as a witness. You're whole support network is made up of witnesses, so you don't dare tell someone how you "REALLY" feel. And if you did leave, where would you go, what would you do?. No witness in good standing would let you stay with them.
In addition, since you have never dated without a chaperone, you intimidated around other men, and get nervous if they look at you. It's a set up so you think you can't leave.