I would recommend taking a look at central Europe, as it is cheaper.
Poland, Czech Republic, Hungary, Austria...
I'll tell you about places I have been, that might interest you.
I've been to different spots in Germany, and it's pretty affordable, in comparison to other countries. The people are very friendly, and most people speak english well enough that you wont have to worry about German. There is lots of cool stuff to see, and this is personally my favorite Euro country.
France is a little expensive, especially Paris, but France is beautiful, and has lots of different things to see and do in it's different regions. I am partial to France, in a way, because I am a French speaker, and I lived there for some time, and have traveled around there quite extensively. But the tuffy is that its really in your best interest to learn some basic French (hello, thank you, ordering food, asking for the bathroom, apologizing for not speaking french and asking if they speak english, etc.). The people are not very "friendly" but they are well mannered, although a little snooty.
Switzerland is even more expensive, and the cities are pretty boring. You wanna get out to the small towns, in the mountains.
Belgium is cheap, and small and there are lots of cool things to see. I've only been to the dutch speaking side, where most people speak English. The people are friendly, but they tend to be kind of "townie" and the country has a slightly "run down" sort of feel to it, as in it doesn't seem progressive and modern, like some of it's neighbors.
Spain is great, it is pretty cheap, the people are very friendly, but they don't speak English very well, but if you know a little spanish it helps, however they dont get butthurt about it like the French do. Although the people along the mediterranean coast are very familiar with english, as there are tons of british tourists and expats around there. There's lots of cool stuff to see in spain (Toledo, Cordoba, Sevilla, etc.). Barcelona is very busy, and theres lots to see there too, but it's not like the rest of Spain, it tends to be a bit more expensive, a little more refined, and worldly.
I've also been to Amsterdam, Latvia, Prague, London, and Italy.