Rejection doesn't really bother me that much. What bothers me is when a female doesn't give an honest answer. I know this is common and I've been on the winning and the losing side of this coin.

Some examples may be: a chick who says she has a boyfriend (because she does) but then you find out she's unfaithful to him with other guys.

A chick flaking out on dates or still having relations with an ex.

Acting like she wants you but obviously keeping you for orbiter status.

Like I said, I've been on the winning side of this before and felt bad for the other guys it's happening to. When I'm on the losing side, it ruins my mood for quite some time.