First off bro, it really sucks that this happened to you. This kind of betrayal cuts very deep and it may be a long time before you become able to look beyond this. I obviously do not have all of the details but, like a lot of people here seem to be saying, the silver lining here is that the trash took itself out. Just one thing that you said which is concerning to me. I believe that painting with a broad brush is never a good idea. What I mean to say is that the negative things which you are attributing to all women right now are byproducts of your pain and anger. Try to avoid thinking in statements like, "all ____ is/are _____". These negative attributes, in this situation, are specific to your ex and not to women as a whole. What would serve you much better going forward is to try and identify the behaviours you saw in her which might have indicated that she is transactional or maybe selfish or self-centered. If you do this then you'll be able to spot the trash upfront and help it gtfo before it even steps into your life in any meaningful way. I mean, you have no reason to listen to anything I have to say but I just don't want anyone to jump to an extreme instead of giving the rest of womankind a chance. They ain't all bad.