My ugly duckling stage was over like in my 3rd year of High School. But that was due to me drinking more water and having better skin, lol. But I'll say college was officially my end of being an ugly duckling simply because I became a much more confident person. I guess that was due to being free from the social constraints of H.S.
As for the later question, it really hasn't done anything for my social life because I am an introvert as far as friends go. Now guys that's another story. I know I'm attractive and at this point is no pressure for me to have the best of the litter