This is a difficult question to answer because I'm trying to see what kinds of dreams you cannot attain. Are these dreams like for example, becoming a doctor...saving children...ect. I know they sound a little cliche but nevertheless I will assume this is what you mean.
In life there are incredible obstacles to overcome, but one way you can look at it is, life only throws at you what you can handle. Just the other day I read a moving story about how a young schizophrenic man made it through law school, and another made it through an economics degree. Most people can't do this when they have no ailment but they both managed to do it. You really have to look on the brightest side of things, it is the hardest thing to do in life - if you can't achieve these dreams, create new ones that fit your views and life. Things can always get better and the human mind and body can always improve themselves, don't ever let someone tell you any different. Human beings have a desire to know and to strive for something, the worst thing you can ever do is to give up and stop trying, this is the ultimate injustice a man or woman can do to themselves, and well alcohol never solved anyones problems.
personally, I would never stop trying until it killed me, dream on.