Of course not. Just because someone hasn't had sex before is not excuse not to get to know them or to start dating them. We were all virgins at some point in our lives; certainly we'd want the ones we are interested in and like have the desire to get to know us in return and not hold it against us that we haven't had sex yet.
I personally feel it shouldn't matter if a person is a virgin or not when you're trying to decide if you're going to ask them out or get to know them, or any of the above. We should accept people as they are. That's my bottom line.
No. If she's a virgin then she's a virgin and if she's not then she's not. Most girls I meet aren't because it's hardly ever the case with anyone and I'm not going to get mad over the life they had before me, but if a girl is a virgin I wouldn't get upset about it. In fact I'd like it.