LP,
Welcome to the JWD forum.
I will not drag on with a diatribe about the JWs, because I have over 20 years experience - born into the cult. I am a man of few words, but I see a possible emotional train wreck in your situation.
Let me give you some helpful advice, as I would my own sister, if I had one. First, don't get into a serious relationship at 18. If you have your act together as I suspect you do, then make the most of it and start a career that will sustain you and not make you dependent. Then if you decide to marry, you will have a career, should something happen to your spouse, or if the marriage goes south for some reason. Second, we buy insurance for our vehicles, but too many people don't consider an education and career as a form of insurance.
As for the j-dubs, please don't enter that cult just to please somebody. That cult requires your heart and soul and teaches conditional love for family members, among other disturbing beliefs. I know firsthand the effects of this cult.
I wish the best for you LP.
Blu-