If you're unhappy- that's your problem within your control to solve. You are actually the only one who can make you happy- so the expectation you have that he sees you're unhappy and he's supposed to change is... well going to create a perpetual cycle of disappointment while you wish for change instead of making the change.

You don't have to have a big crazy fight to break up with someone- it can be civil, and ideally should be civil. "Boyfriend- you're a good person, always optimistic, and you've treated my child very well. I'm not happy in our relationship though, you're a good person but we're just not good together. I wish you the best, but we are breaking up. Let's make a plan over the next 2 weeks to get all of your things collected and returned to you so we can move on in a reasonable timeframe".