What should I do about my boyfriend's indiscretions?

I think what's happened is you two have started having sex and now you're way too attached. You've known him for only WEEKS... this is not a serious relationship and you know he's wanting to date other women at the same time so I advise you just end it now and stop contacting him. You've already had big fights and he's criticising your life choices but you don't even know each other. This is just weird.