I understand what you're saying and this is probably the way he sees it too.

What I'm stuck on is how we can have a lovely weekend, he asks me to be in a relationship, and when I say no, we should get to know one another better, he agrees, and fucks someone else the next day.

I understand not texting someone when you're with someone else. But I was specifically trying him about what we do from here. Our potential relationship that he asked for and I kinda of was leaning toward. If he had taken a single day to just talk it out with me instead of rushing off to fuck someone, we would be dating, and I wouldn't be hurt.

The thing here is we date differently, so you won't truely get my perspective and I won't get yours. I date one person at a time. I get a feel if I'm invested and if not I politely move on and if I am then I pursue it. I don't date 3 people and once, fucking them all, until I decided what one I like the best. It's just a different style.

But I respect your answer. I see both sides, but that doesn't change that this sucks, is on my mind, and I do feel shitty about it.