How do I break up with my boyfriend?

[Grace]

So I am 20 years old and I've been dating a guy who is almost 26 and we have been going out for 6 months now. Everything was fine at first. But now I am convinced he has terrible relationship skills. He says things like I am important and he doesn't want me to feel like his spare time. However he always says yes to more work, shows and hanging out with people other than me. Every time I go to talk about it he says he'll work on it or that its not like that and again I'm most important. But actions speak louder than words. If I go to break up with him he practically has a mental break down. I can't get him to see that he is putting me second best. He seems to only want to hang out in his spare time and I don't really want to waste time on someone that doesn't fit my needs.