My bf has two cars...and he gave me one...?

my bf gave me one of his vehicles...its an '03 mustang...i had a car of my own...but i sold it because i didnt need it any more. it was just taking up space in our apartment parking lot. the mustang is still in his name...and we chose to keep it that way because he is a fireman and has specialized plates on it...plus cops dont pull over firemen...they work as a team (unless im like driving on the median) and i have a heavy foot and tend to go fast and cant really afford speeding tickets...now...if we were to ever break up and the car is still in his name, but is technically mine...am i out of a car?