My friend got a girlfriend and I feel the urge to cut them off.
Is getting a girlfriend the only reason you want to cut them off?
He is a bad influence on me and he is all the time bothering me to get a girlfriend.
If you cut a friend off just because they are happy with a partner then you are showing strong signs of insecurity and jealousy. You cant expect your friend to only want to hang out with you. This could be a sign for you to maybe take a step up and meet some other people as well.
If he doesn't dump his girlfriend I'm going to the police!
Taking your problems to the police isn't going to do anything to resolve this for you. The best thing you could do this talk with your friend and let them know how you feel. Communicating with them may help resolve issues you're having with the friendship.