Establishing Male Friendships

[SFCM]

So my last two relationships have taken big hits over my absence of male friendships and I need to solve this problem in the next few months. The last one was super high quality, and it ultimately fell apart due to my absence of a social life outside of women I used to sleep with - she understandably didn't want me spending time alone with girls I'd diddled but still wanted to maintain an outside social life herself.

The rest of my life is great, however, I do not male friendships in any quantity.

I do have a very complicated relationship with my father, who was a bit of a Roissy-inspired cad. My family did move around a lot while growing up, and I was isolationist until college, and then I was mostly concerned with my interactions with women. I've had a handful of male friends throughout my life, but not very many, and they were doing all of the work in all cases.

So here are my quesitons:
1. How do I go about establishing male friendships with mature, positive guys, starting from zero?
2. Where can I learn about the boundaries of platonic male friendship without having to go through a ton of embarassing trial and error, ie is anyone aware of a solid how-to guide on how to make friends?