My boyfriend hits me

"Dear Housewife,

My boyfriend hit me once while he was drunk...because I went out with a "slut" to a party.
He was scared that I'll turn into her. Pretty insecure boyfriend there, but the fact that he hit me wasnt good.
I stopped talking to him for a week and he came back begging for me, so I got back with him. He said he would never do that to me again.

There's this guy in our class (me and my boyfriend are classmates) who likes me, and hes my boyfriend's friend. My boyfriend dosent like him much just because that friend flirts with me.
All three of us went on a car ride and I didnt know my boyfriend was drunk. When I asked his friend for a cigarette..(actually was kidding and I dont smoke) my boyfriend got angry and he started hitting me and I cried.
I went back home and stopped talking to him again. It's been three days, but the problem is that I really love him, but hate him for hitting me for no reason.
He just went on hitting me again and again until we reached my home.
His friend was scared that he just drove fast so that I could escape. Now, I just want to know how long should I ignore him for what he did? I dont want to break up because I really love him and hes my first boyfriend.
I feel pathetic please help.
We've been together for two years and this is the second time he repeated the same mistake.
I hope if I allow no contact for awhile, that he might change but I need your help."