Former "Nice Guys" of Reddit, what happened to make you change your ways? What advice would you have for current "nice guys" looking to get out of the friendzone?

Finished my time in the military, went back home, tried the online dating thing. Met a "nice girl" who turned out to be a bit of a whore behind my back. A friend of mine was the one that spotted her out seeing another guy. I super-spied my way into her text messages and confirmed she had been seeing multiple guys. I confronted her about it, she said she would stop, but she didn't. Somehow we got back together a few weeks later and she apologized and said she was done doing that and wanted to be with me. I decided I didn't care, but that I would just "get mine" and whatever happens happens. I treated her pretty poorly during that time and she seemed to love me for it. I lost any remaining respect I had for her because of that.

Well, she informed me she had met someone else one night. I looked her straight in the face, shrugged, and said, "Aight, later." She didn't understand why I wasn't bothered. Kept trying to talk to me a few weeks later. Told her to go suck someone else's dick.

Well, after meeting 2 more girls like her online, I decided online dating is just for women seeking attention from every guy to sustain their self-esteem. I became bitter and started saying stuff without a filter. Girls loved me for my straight-forward conversations. It made them "feel relaxed" and "trusted me". So, I kept it up and here I am the negative-nancy boyfriend that doesn't care when we are 3 months into the relationship. "Bitch, you liked me the way I was day one! I change for no one!"

/r/AskReddit Thread