Ok, so let's focus on that. About the part that you mentioned about it being bad. What was it about, and why. Remember, to be honest, and to be fair. When you realise the red flags, then it will hurt less.
I actually read your response to the other thread and I thought to myself "facepalm". Cos you asked him outright and he literally did it. lol...
It reminded me of the situation where I recently broke up with a guy of say round 6 months or so. I watched the movie One Day, and I was so blubbery and then I dumped him that same night. He was so upset. But then since then, I had to console him through it all, and once a while, an angsty comment comes out from me and he bypasses it. I realised my red flags, and I also realised that I did not control it, and he also did not put me first, so it was going to break eventually too. I recently laughed as he showed me a girl that he had been checking out. I also realised that as harsh as it seems, it will be that one day it will end up as pretty real.
We are definitely much happier.
SO, my advice is, as much as it hurts now, let your emotions go through the sting, and asks yourself what were the red flags to begin with. Once you realised what it is, write them down. Because these "red flags" are actually things that you want from him as a partner. For example, I wanted the guy to put me first. He did not commit to me, and nor did he put big future plans about his life to include me too. He assumed an awful lot, without even asking me. So well, it has to end doesn't it ? Whereas I tried to offer solutions which meet him half way, he did not take those ones. So when reall, we tried our best. I was not really focusing on him either, which was my downfall. For example, he tried to make me eat things that I did not like, and I ended up being sick. He was that kind of a partner. Big red flags, crossing personal boundary til I die. (Of food poisoning.)