put new wheel on car, not it shakes at high speeds...

[97CivicBoy]

So yeh I hit a curb a few months ago and was riding on my brothers stock wheel ever since. I finally got a new wheel this weekend, same tire size and honda wheel. I replaced it for the front passenger side and now when I drive on highways it shakes at high speeds and doesnt feel right nor safe. I talked to teh kid I bought it from and he said it was balanced and everything and that since i have a fwd car that I need to have two of the same tires in the front and to throw that one in teh back and that shoudl do the trick. Is this true or did i just by msefl a shitty wheel, it looked good and tire had some decent tread...