Please don't lower yourself to being the woman he comes back to after he shags around. You deserve way more than that!
How would you feel if he got a new partner? If it would break your heart, you can't be friends.
Please cut ties with him.
Don't call him or message him.
If he calls you, don't answer. Give it a couple of hours before you text and say 'Sorry I missed your call, everything ok?' Grey rock the situation.
If he texts you about general chitchat, ignore; or reply with very bland answers. You don't need to be rude, but you don't want to get into a conversation about nothingness.
If he tries to contact you after 8pm, consider it that he's after a booty call and ignore.
I advise against blocking in this situation because it looks petty and like you're bothered; you don't want him to think that he's upset you like that.
Mute on WhatsApp and social media.
Above all, start living your life. Have fun, go out with friends, start a hobby. Keep yourself busy. Make your life so enjoyable that you can't even remember what it was like with him in it!
It's tough at first, but fake it till it becomes real.
Remember, you deserve so much more.