I mean, Im not one to knock on relationship age gaps as long as both people are over 18, but I think youre overlooking the fact that she probably focuses less on you and more of your age related qualities such as financial stability and maturity.

On the other hand you need to focus on her age related qualities. Shes 18. Shes probably immature as fuck, and I personally was an 18 year old who was "mature for my age" which stiill made me an immature slob.

If you do this, try weeding out the bad eggs. Dont let her have access to your bank account and move at a slow pace. Ive seen a fair number of situations like this and sadly it comes from the 18 year old wanting an easy pass in life and using love with a grown man/woman as the key.