You are not less worth, as another said no one is worth less than anyone.

I think that your parents should take your feelings seriously.

I think I know how you must feel and I am sorry for that. I experienced similar thing, I couldnt be picked up, so got told to take the bus and I would get some coins to the bus, all because they didnt know my adresse ( which was an excuse ). I was the only one not being there at christmas eve because they didnt bother to pick me up.

Maybe the other posters here are right, but I think if you talk with your parents about how you feel, they should show more consideration for how you feel.