Should I Keep Holding On?

I’m a 26 year old female in a relationship/situation with one of my cousins friends. We were pretty good friends before we called it serious, and have been living together for a little over a year. Well the first 4 to 5 months everything was going great till i started to take notice of his time being away started to be a little lengthy like 14-18 hours and he wasn’t working yet. So i as a woman started to look at myself, wondering if it’s me or something about me. So the minute i try to address the issue appropriately… I didn’t come to him like there was a trust issue or anything of that nature. He automatically blew up about it and asked if i thought he was cheating. So we moved to a different place and the second night we were there, he said he was going to pick something up at like quarter pass 9PM. When he didn’t come back by 11PM, I used the neighbors phone to call… No answer. I waited and called back an hour later his phone was off. I woke up and he still was no where to be found, so I started calling around to see if i could find him. He walks in like nothing happened at 1PM. When i asked how come he didn’t answer his phone he blew up and it was the same thing over again. I told him to call me and let me know if he wouldn’t be making it home or to communicate with me at home so that we both have a better understanding. He said he understood where i was coming from and that he would communicate with me. Well he stayed out didn’t call and i didn’t see him till the next morning. He always says his phone wasn’t charged, but he has a car charger. I asked how come you don’t charge it in the car, he blew up and said i was policing him. There has been time where i couldn’t get to my phone fast enough, and called him back and had to listen to all kind of obscenities calling me out of my name wondering how come i didn’t answer my phone. That’s when my trust and faith for him started fading. We got to the point where i got loud and yelling because i felt i wasn’t being heard, right along with him. When i used to try and calm him down, now i’m the one with the wrecked nerves. He’s left a message on my voicemail saying he wants to break up So i left, and he’s talking that this don’t have to mean break up and maybe we just need some space. He said he hopes we can forget the past so we can gain a future. I’m at the crossroads I really love him and want what we had back, but at what cost? What should I do????