The end of season one saw Mel bailing on Virgin River after she finds out Jack's ex Charmaine is pregnant. However, Netflix's November preview shows that Mel is definitely in town. This photo from season two also shows Mel and Jack looking pretty comfortable with each other, so we're hoping that means they work out their trouble with Charmaine and actually get together.
However, if you know anything about the Virgin River book series, you have an idea of the tumultuous relationship Mel and Jack go through, and we're hoping the happiness between the two of them is what we get on the show and not the huge ups and downs that the book characters get.