If you are lonely and unattractive, not necessarily fugly, one way to boost your self-confidence is to imagine - imagine that there are a lot of men harassing you.She never heard of whistling and making pok pok pok sound ?
Even a housefly that rests on your table while you are having food at the hawker center you must try to imagine that it was an act of harassment. Every innocent act must be interpreted in the context, however ridiculous, as an act of harassment by the opposite sex.
When you are able to stretch your imagination to the level of hallucination, your self delusion that you are [still] very attractive is COMPLETE.
The moral of the story is this: self-delusion brings self-confidence.