Time to be strong.

I would simply break any and all contact with him period, no texts, no Hi's no how are yous, no phone calls letters emails etc, screw being friends with him, especially if he is going around spreading lies.

And then let him suffer from a distance while he watches me go out and have fun with everyone and anyone else I pleased in the local scene.

Your real friends won't think any less of you and the others are not worth your effort.