Hey, think this one was aimed at me. If so, then I'll try and explain what I meant by too much too quick.
So, about a month into dating I'd want to know whether we're exclusive. A couple of months in I'd have expected to know their opinions on marriage, kids etc. Not marriage, kids with me necessarily, but do they see kids in their future at all. I'd also expect by then to have had a few conversations about big political topics etc, found out whether our world views align, that they're not a massive racist or believe in a flat earth etc.
For me, that's just doing your due diligence, fact finding, making sure that your long term goals are compatible etc. But aside from that info, at 4 months in I'm just focussed on having fun with the other person. I'm not picturing a future with them.
If at that point we're having big conversations about our feelings for each other, who loves who, the details of breakup with previous partners etc, that would all be a bit much for me and I'm probably back pedaling like a madman.
It sounds like this may have been coming from him more than you, but the fact that you've felt the need to post this after a 4 month relationship suggests you were very enmeshed in it as well.
Even the breakup conversation itself seems very involved, why do you even need to know that he's not falling for you as quick as his ex etc.
Every break up I've had at that stage basically just involved one person going "Sorry, this isn't really working for me, I wish you well for the future", and the other basically shrugging and moving on. We had some fun, it ended, onto the next thing, it's not like it's been going on for long enough for any real feelings beyond lust to develop.
Obviously everyone's different and some people take things faster that others, but the level of intimacy described in your original post would send me running for the hills.