Never underestimate someone by how they look
In society a lot of people judge people. People who are not so good looking will judge people who are and vice versa.
Just because someone is good looking does not mean that they are mean. There are girls who are pretty and nice. They may be popular and their personality can be what makes them popular. Just because they are pretty does not mean that they are stuck up.
If a guy is good looking that doesn't mean that he is a player. A guy who is a little nerdy can cheat on his girlfriend just as a good looking guy can.
Today don't judge people and if you won't give someone a chance have a reason. Don't let your insecurities get in the way of your future.