Why is he doing this (breakup questions, we live together)?

[Jenna]

Hi guys. So basically I've been with my boyfriend for 5 years, living together for 4 and a half. We have talked about the future and ending up married but neither of us are ready for that at this point as I still have stuff I want to accomplish before doing so and am not in a rush. We are best friends though have an active sex life and spend almost all of our free time together. We do fight and have been fighting a bit more lately. He wants to make it as a producer and says that I hold him back (even though I have bought almost all his equipment, set up a music studio for him in the house , and encourage him to work on it) though yes sometimes maybe I do want too much of his attention which I realize. Anyways, He recently said he wants a break and is going to move out. After looking at places he was about to put an application in on one but didn't. That night he texted me and told me he really just needs a night to think and did not come home until the next morning. When he came home he told me he had missed me and isn't ready to move out and though he still wants a break and thinks we both need to grow individually, he doesn't want to move out. And that hopefully we will be able to work it out. That night he was all lovey and spent the whole night with me watching movies hanging out etc. now yesterday when he came home from work he was still nice but went into the other room to work on music (he's trying to make it as a producer) I had let him take my iPad with him to work and when he realized it was in the room with me came and asked to see it and then logged out of his instagram and twitter page, which insulted me, and then left. At this point I was offended and kind of just gave him the silent treatment and didn't bother him for about 3 hours while he worked on his music. When he finally came back into the room he saw that I wasn't talking to him and said "this is why I don't want a relationship" and that I'm "wack" I finally said what are you talking about you told me just yesterday you hope we can work things out eventually and that we just need a little space but you don't want to move out. He then said I misunderstood him and that he definitely needs a break and still feels he needs to live on his own at some point and that he had just missed me which is why he was being so lovey and that every day he feels a different way.
So basically I am SO confused. I know we're both young (24 and he's 26) but my emotions are just up and down. I definitely don't think theres anyone else in the picture but I just don't know what to do at this point. I love him and want it to work but I don't want to get strung along. Also, I have been paying a majority of the bills throughout our relationship and we currently live in a house we rent from my mom (all he pays is around $400 each month and he has his own studio room I helped him set up) and maybe I'm doing too much for him. I'm just confused and need some guidance or advice at this point. And is it even possible to live together when on a "break"? Should I leave for a while should I have him leave for a while or should I just give it space until it figures itself out?
Thanks guys