Is it normal to constantly thinking about wanting sex?

Ever since my teen years until now, I have had a constant wanting to have sex. Ever since I turned 18, I have searched for sites to get laid with no success. Due to lack of communication with others/being quite, every weekend at 10 I would want to go to porn sites to visualize I'm in that position. Is this wanting desire normal? If I am having a hard time finding a partner to get laid, how can I bypass it?