I'm planning on moving to Lithuania

First, I have to say that it's foolish. You're young, and you need to have your heart torn out a few times more to make you more cautious. This girl is telling you no, and you're not listening to her. Even if she has nothing but good feelings about you, the guilt she will feel if you come to Lithuania may cause her to push you away.

Consider how life would be for you in Lithuania. As you know, the United States' healthcare system is bad, ranked at #37, just above Slovenia. However, Lithuania's healthcare system is atrocious, at #73, below Mexico and Nicaragua. In a Lithuanian E.R., the equipment is primitive, the staff is overworked, and the patients are mostly old, uncooperative drunks who puke and fall onto the ground. Wages for doctors are bad, so many leave for other countries.

Suicide and alcoholism rates here are sky high, which probably has something to do with the lack of sunlight in the winter. You definitely should escape every year at Christmas to visit your family in California.

You're at a community college, so when you transfer to a university, pick one that has a student exchange agreement with a Lithuanian medical school. I know that for economics, University of Northern Colorado has an exchange program with a Lithuanian university, but I don't know for med school. If you come here for a semester, you won't need to speak Lithuanian.

The easiest way to become a Lithuanian citizen is to marry a Lithuanian, live here for 7 years while applying each year for a 1 year residency permit (you need a job or money, even if married), and then you can take a citizenship knowledge test (about the constitution) and show that you can speak Lithuanian, and that's it. You will lose your American citizenship. You will still have to pay taxes to America for 10 years afterwards. You can't be double-taxed in theory, but if you're self-employed you still have to pay for social security (pension), which you won't get when you're old, because you won't be American. Recently, Lithuania has reinstated the military draft, so you might qualify once a citizen! Check with a lawyer or research on the Internet, in case I am mistaken about any of this.

The better course of action is to convince this girl to come to America. You could start by flying her there for 90 days, which requires no visa, so she can see what it's like. For her to get a green card, you'd probably have to marry her, but that is not so crazy as what you have proposed. U.S. residency requirements are much lower if you get married in America compared to abroad. She can live and work in America for up to 2 years while her application is being processed. However, you have to realize that she's going to be bombarded by American men trying to steal her from you.

Finally, this will sound heartless, but remember that there are many fish in the sea. It's not just this Lithuanian woman who is beautiful and sweet. Most of them are.