As a Romanian I understand best Italian, then Spanish, then French and lastly Portuguese which is little odd for me.
The lexical similarity of Romanian with Italian has been estimated at 77%, followed by French at 75%, Sardinian 83%, Catalan 73%, Portuguese and Rhaeto-Romance 72%, Spanish 71%. In modern times Romanian vocabulary has been strongly influenced by French, Italian and other languages.
More on wikipedia if you are interested: http://en.wikipedia.org/wiki/Romanian_language
BTW, are you Spanish?
>BTW, are you Spanish?
Nope, Italian.
Things get better in writing, but there's still no comparison to Spanish.
After all there was a longer interaction with the latter: for historical reasons words and verbal constructs in southern dialects can give insights with regard to it or French.