When someone tried to talk to me one on one I can't listen for more than a minute without zoning. Always have to be chewing on something like my nails?

?drugs. Are you using marijuana? This can be a side effect. If you are not taking any drugs, and you are still zoning out a lot, you should probably see a psychiatrist.
Seek evaluation. Those symptoms can indicate the presence of attention deficit disorder. I would suggest an evaluation with a psychiatrist who is experienced in treating add.