I am almost going to be 19 and have never had a girlfriend before, how to deal with this minor depression?

Just wait for the right person to come along the road, it may take a while. You can also leave your parents house and move some where else, and to do this, it means save some money up and get a job (if you don't have one). I would definitely suggest getting out of that area though, it will hold you back from your full potential.