Easy to meet someone? Of course. Easy to date? No.
As Julian Delphiki said, if you stay at home, you won't meet too many people, meaning you won't meet too many single, eligible people. However, if you put yourself out there, you'll be meeting tons and tons of people (your classmates, upperclassmen, perhaps people from different professional schools). But dental school is not an easy ride - you will be busy. Staying in a healthy relationship requires a lot of commitment. There are people in my class that have already broken up with their partners, and it's only the 7th week of school. I myself am dealing with a very stressful relationship (very very long distance - we're working it out). Combined with the stress of dental school, I can see why a lot of people can't deal with being in a relationship.
That being said, it's still doable as long as both parties are committed. But beware about dating someone in your class. Imagine a terrible breakup and how awkward it would be to see your ex for the next few years of your life, everyday.