A girl which you can consider to be
more than a friend to but less than a girlfriend if that makes sense, you may rely on her for sexual or emotional reasons but stil
dere are
no strings attached therefore at anytime de bond can be broken and either the boy or the girl free to find other links.
A guy might get
overprotective towards a link if somehow he gets too
emotionally attached to her and finds it harder and harder to see this girl with another guy. Sometimes it may be seen as the guy being
in denial becsuse deep down he wants a relationship but he may not know if the girl is wifey-able (reasons may vary)