I have always used my family and friends first, as a guide as to the progess of the story, does it flow nicely, have i left anything out etc. I find they can do this without them having to give me too much feedback on the story itself, (because honestly, do you really think your mother is going to tell you the story sucks!) I have also joined a book club (a group of people who love books, and get togther once a month to talk about the latest, best, worst books they've read recently. They're not necessarily writers, just people who enjoy reading, and of course the obligatory bottle of wine) and i get my feedback regarding the story from them. I find that because they're not particularly close to me, i receive a more honest response from them.
Maybe get some of your colleagues from work, (if you trust them) friends (not your best friend unless you think you can get an honest response from them) or even your family doctor etc. (mine asked to read mine the first time i'd mentioned i'd written a book)
If you look around, i'm sure you'll find more than enough people who would love to read your work.