I've been in the US for 10 years and am still homesick. It's never gone away, but it has changed dramatically in intensity. Mine was compounded by illness and depression, but it was pretty awful for a while. It's normal. You go through phases of feeling more or less fixated on it. I found that the more isolated I felt, the more I wallowed. Being around friends, laughing, doing things I really enjoyed, getting some exercise, listening to a good radio comedy/drama helped enormously. You can listen to many local and national radio stations online
NPR, for example (I am hooked on BBC radio 1, 7, and the World Service). If you have TV, British TV's saturated with American imports. And one very cool way of combatting homesickness is to get involved with your area's local history: check out local history groups, books, and tours. Learn about conservation and environmental groups in your area. They help "plug you in" to the area you're living in so you feel more rooted and less like you're drifting. Most of all, remember that if it doesn't get any better, there is no law preventing you and your love from living elsewhere.