I fully agree, it seems like you already know what you have to do...I agree with you that you can't avoid female nature. But my friend and my gf flirting in front of everybody at the dinner table is not something I will let slide. She wants to get married, pressures me every other month and then does this ****. I can't marry someone with this behavior or who subtly flirts with my friends, that's a no-no in my book.
I'm neither blue-pilled or red pilled. I have had my experience with women. I know female nature and that's the reason her actions pisses me off even more.
Agree with this point as well. He sure did out-alpha me and I was aware that this was the case. But why should I be in competition with one of my so-called bestfriends who I've known since 20 years? If he wants to act alpha let him, and if my girl wants that energy she can go to him. I'll lead the way for her. But I will be out of the picture and in a couple months I'll probably have a hotter girl beside me. Playing alpha games with your friends is a weak mindset for me.
The good thing here is that they showed you their cards, now you won't marry this user GF and you will cut off a snake friend.