What if she is an orphan won't she be allowed to stay alone, sometimes attitudes of some parents and relative you stay with will make you want to stay on your own,some of them are terrible.

Honestly I don't know about other people's opinions here, but if u want the honest truth I will tell u , this ur so called cousin is 22 , she just want time and space so she can be able to have a guy over for sex when ever she seems fit, cause u know she can't do that at her parents house, it not because she is a reserved person or anything like that, u keep saying she is not a hoe , trust me , she might be worst than a hoe , it's just that u don't know. Sometimes in life we can't see what some people really are cause we are too close to them , while some times we might know but we get sentimental and refuse to accept the the Truth

Don't be worried she will still see a quite person like that will win her heart and she will never love to stay alone again

The issue may not be like that si may just like to be alone or may be she is passing through Emotional agony