Should I Move?

Since this is somewhat related to a long distance relationship question, too, I'd like you to read the following > link

Then up to your question:
1) You made a promise!
2) Her parents are strict and they do have a huge influence on her!

Solely given those two reasons, you are clearly the one to make a move since you need to show her parents that you stand for your words...

Because I can tell you what will happen if you don't move. Her parents will talk you bad. Like really bad "You see, he's not making a move, he promised you things but he didn't keep this one promise. He's not willing to sacrifice ANYTHING just to be with you..." Something like that.
And honestly, if she's somewhat clever - at the time this happens, she'd be best adviced to simply leave you :(

You just made that promise and either you stand in for it, or you don't...
If you can't keep it, you gotta talk with her, to keep things going, but on a slower pace :(

There is an old saying:
"A son is a son 'till he takes wife,
A daughter's a daughter the rest of her life"

...when a guy and girl marry generally he leaves his family to join hers. This has happened to so many people they made a saying about it. And have you considered when you will have children?

New moms (I don't care if they're 30) need a support system when they have a baby. Your fiancé sounds like she's real close with her family. This will probably be her sisters, aunts, and mom - but mom most importantly. I normally wouldn't bring up the kids, but you're only 18 and asking about getting married and moving...so maybe you're thinking kids soon too.

Also, why don't you want to move? Because it’s hard and you'll miss your family. Well duh, she feels the same way. Why are you asking her to make the sacrifice you already promised to make?

move to delaware she will be your wife so that's your new family and it does not mean you have to forget the old ones you can visit them on holidays and other special day. If its too much of a problem why doesn't she move to live with you?

You are engaged to be married at 17?

A lot of questions come to mind here not to mention you have only been with her for 13 months. Marriage is not a game or some cute little thing to do. It takes a lot of hard work and commitment.

How did you meet her and where?

Why does she live in a different state then you?

Love and Marriage are tow sep. things and at 17 I don't think you really have the slightest clue what you are getting into.

My answer would be, do not move and live your life a little, if the two of you are meant to be together then it will all work out.