She did not get pregnant from you?
I am in Sweden right now so allow me to answer this much needed question.
LMAO yes all Swedish girls upon first seeing a black immediately want to have dem babies.... I have an uncounted number of baby mammas in Sweden.....Swedish girls like black dudes so much that most of Sweden is expected to be multiracial in 10 years...............
Ok now that we are done with fantasy land..........They honestly would be more into the fact that your American then the color of your skin. Africans often get jealous of us black guys from the states because of this. Yes on average Swedish girls look better then American girls, and you will probably find prettier girls then you expect paying attention to you. More to do with you being American then being black. I put a lot emphasis on this Swedes in my experience are also more upfront in talking about racial issues, and will ask for your opinion.
That being said you will find it difficult to get an actual relationship just because you are a non Swede, and do not speak Swedish. Sweden is not the place to find a women for a serious relationship, and some Swedes actually agree. A number of Swedish men literally import brides from Thailand.
It really depends on the girl you meet, and if a Swedish girl is single, and staying long term somewhere else she would probably be more open to having a foreign boyfriend. People are different when they are abroad this is a fact of life.
Swedes do not date, and you can still be having casual sex, and still just be "Friends" Swedes are rather sexually liberal, but all this talk of how easy Swedish girls are is very much overexagerated. Swedish girls also never expect you to pay for them ever. But if you do they will appreciate it. (My advice though is to cope with how expensive Sweden is, and do not be gentlemanly.)
End Note
Girls are pretty much the same all over the world. Its all about being at the right place, right time, meeting the right girl, and having the right chemistry. If she likes you, you will know. Yes you will also find that women are confusing, and impossible to understand anywhere.