Is there something i cant see?

Ive been dating my boyfriend for 6 years now. Iam nearly 23 he is nearly 24. We do argue quite abit. Recently i got attacted and things have got evan worse between me and him. Last night i was cookin us a meal and i txt him to ask him what time he would be home at around 11pm he said half hour. However i know his time keeping is pretty bad so i eat my dinner then decided to text him at 2am that i was going bed as soon as he wasnt answering when i phoned him. I finally got through to him when i woke in the night and again he told me he was on his way home that was around 4am. I got up at 9am he still wasnt back when he finally switched his mobile back on i called and he was at his mates house he said i could hear boys and girls in the background i was really upset it was around 10am and he wasnt home still. He kept saying he was in a cab after that and 5 minutes away. He finally come home at 2:10 this afternoon and told me he was too tired to speak i wanted to shout n scream bout i didnt i let him sleep. However he awoke a hour ago i told him i was going to stay at my mums the night and would speak to him tomorrow he went mental. started screamin and thru his water all over me. Then he was sick everywhere and beggin me to lie down with him and cuddle him. Whilst he was screamin and shoutin he told me he hated me since i got ually attacked and that he wasnt at his mates he was somewhere else with firends and its none of my business. Im soo lost i dnt know what to do. He is being friendly know and said when he wakes up he will tell me the truth ?? He is still drunk off his face. Am i missing something or shouldnt i be worried?? please help