a friend of mine was with his girlfriend for 3 years long distance. (in which he cheated) but when she returned they lasted together 3 months..
the thing is how well you know her. long distance is not hard, a few phone calls here and there, then when you meet its all good because you havent seen each other for a long time.. the true test is when you are eventually together all the time and there is a chance to not like it.. so why invest? its a risk, take it or leave it..