Hi woundedbull and welcome
It's great that you found the site. You're in the right place to get lots of support and understanding from others who have had similar experiences, some of whom have weathered these storms and come out of the other side. It can be done.
I'm sorry to hear that your friendship with your ex has hit rocky ground again. How long were you together and is it a long time since your split? I know you say that people think friendship isn't possible, yet every relationship is different and what works for you is what is important. Would you want to resume the friendship once this blows over?
I can handle the silent treatment, but the lies about me, especially to a friend is very hard to swallow and is the thing upsetting me the most.
I can understand that must be very hard, especially if you value that person as a friend and their opinion of you matters to you. Because of the close relationship they have with your ex it may be that they believe her, yet if they also know her well and know that she could be capable of mistruths then I'd tend to worry a little less about the impact on that opinion. After all, they might just be giving your ex support right now because she needs that and their opinion of you could remain unaltered. I think your decision to let sleeping dogs lie right now and allow things to calm is a wise one. If you're right and contact will resume based on past history then you will get an opportunity to address this.
Meantime I'd suggest taking some time out for yourself and definitely take a look at some of the fantastic articles and tools on the site which can help you a great deal. Keep reading and posting too.
Love and light x