I agree with Freak and Y. A spotter, one who knows his ass from a hole in the ground, will always help you get that last, all-important rep out. A rack is better than nothing, but it can't do that.
If you're like most of us, you probably felt intimidated by just walking into a gym when you first started, but that went away right? Same with asking for spots. It'll become normal after a while. Most guys will be happy to help you out.