Should I find closure if my relationship ended in an explosive and unresolved argument?

I need some help guys. My relationship with the guy I've been with for 5 months has ended, and it ended bad and explosive. First of all, my guy doesn't know how to communicate AT ALL. If there is a problem in the relationship that I try to bring up he either laughs at me for feeling the way I do or says he has to leave. When I ask him what he feels or thinks he says "I don't know." I don't know seems to be his answer to EVERYTHING. When we are together and we get in an argument he automatically closes off and physically leaves. I try to get him to stay and talk and he says things like "get out of my way", "I don't want to talk", "I need to leave". He leaves, I won't contact him, and then a few days later he'll call or text me like nothing happened. At this point I'm just so happy to hear from him that I don't want to push him away again by bringing up the argument that made him leave. SO, our problems always go unresolved and never, ever talked about. Lastnight he came over, it was the last night I could spend with him because he's leaving for training all the way across the country for 4 weeks. To top it off, he's leaving 2 days before my birthday. And the story goes like this... I'm standing in my kitchen looking at my cell phone when I see his phone 

charging right next to me. The other night I saw him flipping through his text messages and I see a text message from a girl that he use to be intimate with, I decided to just forget about it but with the phone in front of me I got tempted to see what that was about. So, I pick up his phone and flip to that recent text message from that girl and she is saying that she misses him and loves him. My guy catches me looking at his phone. He walks out of the house and comes back inside and tells me he's leaving. Mind you, he looks through my emails and text messages all the time when I have asked him not to. And we both have some major jealousy and trust problems. I have found pictures of another girl he use to date that he receieved while we were together and she still sends him emails and messages on facebook. I have seen messages he's gotten from 2 different girls he use to date as well. Anyway, I'm upset because I want to talk about it and he wants to leave in a rage knowing I won't see him for 4 weeks. So, I try hugging him and kissing him asking him to talk to me and he starts telling me to move and get out of his way, there is no way he is staying. We are in my bedroom and he starts yelling my roommates name, to come help him cause I was trying to get him to stay by standing in near the door. I get so frustrated and sad that I take whatever is in my pocket and threw it at the wall as hard as I could as I'm yelling at him. I pretty much exploded after having to hold everything in, all my feelings and emotions. I kept saying what the f**k is your problem, you have issues, you're such a f'ing this and that, you don't know how to communicate, you're such a pu**y, a little b*tc*. I went off in a complete rage. He walked out of the house. Texted my roommate to come down and bring him his things which included clothes, and the birthday present he got me. My roommate tells me as he was driving off he said "It was really good to meet you." I know it's over, I know lastnight was my fault but I know it's more than last night. I'm upset too for everything that has happened and how I've had to bottle everything up, I'm embarrassed and sad for looking at his phone and calling him names. I know he won't call. Do I leave it as this? Do I apologize? Do I call? Text? I don't know what to do...