Why would my boyfriend completely disappear for an entire day and make no contact?

we have been dating for four months and we are both 24. we have been on and off because he drinks a lot and can be a bit much to handle. some times i tell him i need some time to cool off usually a couple of hours or a day at the most because when he gets upset he says some very personal hurtful things. I've... show more we have been dating for four months and we are both 24.
we have been on and off because he drinks a lot and can be a bit much to handle. some times i tell him i need some time to cool off usually a couple of hours or a day at the most because when he gets upset he says some very personal hurtful things. I've probably asked him a total of 5x in the relationship to give me some time to cool off and every time with out fail he has joined an online dating website, exchanged contact info with other women, contacted them and attempted to pursue an intimate encounter but not followed through.
i was sexually abused as a child and out of severe frustration he threw it in my face and I hung up the phone and was incredibly angry and had broken it off. He didn't call me or try and mend things, I emailed a male Facebook acquaintance during this time and asked him to see a movie with me. a few days later my ex came around and was apologetic. he invited me over to talk things through and he asked me if i had talked to any guys while we were broken up. i told him that i had asked that one guy to see a movie. my boyfriend then broke his cell phone in half in a fit of rage and was really pissed off telling me that i was a "floozy" that i couldn't be trusted etc.
after 20 minutes or so he calmed down and apologized. we had a fairly decent night after that. the next night he had a family christmas party which i was invited to by his mother but declined due to the fact that his family take things to far with drinking and smoking weed etc. my boyfriend told me that he didn't want to stay at home for the party and that he'd spend the day with me...however he bailed on me and decided to stay at the party and invited me over after it ended at around 9pm which i declined and went to sleep.
our primary method of contact now is via Facebook since he has no phone. he messaged me today at 1pm saying hi and then called me from his moms phone an hour later...he told me he needed to get off of her phone to save minutes and that he'd log right onto Facebook because i wanted to make plans. that was at 1:30 pm yesterday. he never answered my messages on there for plans, he didn't attempt to try and call me at all....he hasn't made any contact which has never happened in the 4 months we've dated. i know it seems dramatic...but if you knew his needy personality you'd understand why its a red flag that he hasn't tried to talk to me at all since then.....
why do you think that is???
7 answers 7