In present-day world most of the girls have had relations at least one time till 21 year. But I think it’s not abnormal not to have a boyfriend till this age. There are many reasons for such situation. For example, this lady can be not very attractive. And nobody wants to be seeing her. But I’m sure she needs to wait a little to meet a guy who will want to be with her despite her appearance. Or, maybe, that girl is too choosy. And she hasn’t met a man who matches her nonpareil. Such lady has two ways. Either she will meet a perfect guy or she will go behind her claims on a possible boyfriend. A girl may be focused on studying and career and has no time for relations. But I hope she will prefer love sometime.