It can be a curse as well as a blessing actually. I am quite happy that I close to fluent in English, since most people of the world are able to speak and understand that language right now. Being bilingual can (like WhiteRabid says) also help in learning more languages are at least broaden your lingual horizon making understanding other languages easier. It may sound silly, but it helped when I was trying to understand Swedish, and discovering that in stead of putting the word "the" before a noun, in Swedish they make that effect by suffixing a word with "en". So the famous song title "Boten Anna" basically translates to "The bot Anna". This is because English grammar does differ from my first language's grammar (Dutch) on many fronts, so being bilingual does help me to understand there are multiple grammar rules and language flows. And yet, since Dutch is a terrible language to learn (I warn ya) we always have a good time when foreigners try to speak Dutch... Videos on YouTube in which people try, are bound to attract loads of Dutch who are amused by them (although we respect all attempts, as we know how hard our language is).
There are downsides though. My autocorrect on my cell phone tries to correct all Dutch words I type to English words with the closest spelling. And that often leads to very funny outcomes. One non-sexual message was turned by the corrector into a pretty vulgar thing which I didn't dare to send (as the recipient was of the opposite sex, and I was sure I'd offend her if I did), and mostly it does send shit beyond comprehension. Now I can set different languages in Android, no problem, but it's quite some hassle and as I have to switch languages in a split second, it's not an option. My Dutch fellows know that if I text or app them with my cell phone I'll just use English in stead to prevent trouble. On my desktop I can type in Dutch without words being auto-corrected, but when I write in Dutch 99% of the text is deemed incorrect (how obvious), and switching languages there is also not very handy....
So it has it pros, but also its cons....