I'm going to block out my friend after he told lies about me to get a girl
Is this something that he does often?
Yes, I really try to be his friend but this is the last straw
I think that's a fine reason to end things. Sounds like he's just using you.
I'm going to take it a little farther following this plan [Blocking/harming him]
It may not be a bad idea to let this friend go as this is a crummy thing to do. It can not feel good to be used in this way, and you do not need to be friends with someone who wants to take advantage of you in this way.